Hi guys,
A disclaimer: this post is NOT intended as some sort of brag/show off, but a serious request in hopes to find a solution. If someone believes that this is a brag, please ignore my post - the best way to make a bragger go away is not to give him any attention, right? 
This is a very serious problem for me, I'm starting to get a bit desperate and I no longer know where to look for help (I've been to a few teachers and none of them made a difference so far - explained below), so I'm really hoping you can help me out. Apologies this post is so long, I just felt it was neccessary to properly convey my problem.
I started playing I believe in the very first week of January 2010, on an ooold, small (4 octaves) Yamaha keyboard, the kind you give to children (no weighted keys or anything like that). From the very beginning I've never really had any trouble with "motorics" as I call them (apologies if this is a misleading term); meaning, even with difficult pieces, I had no trouble movement-wise in playing them - I could get the fingering correctly immediately and instinctively, had no serious trouble with speed etc. In my first 2-3 months of playing I could play Mozart's Turkish March, basically any two-part invention by Bach, beginning of beethoven's Pathetique mvmt 1 (the whole first part in "Grave" and the whole first page in "Allegro molto e con brio"), chopin's minute waltz.
The first few months of my playing I didn't really take piano seriously; I played around 1,5 hours a day, wasn't really aiming for anything and was content with simply playing a few pieces. I would often learn only 15% of a piece (for example, a particular part that I liked) and ignore the rest, etc. It wasn't until around 2-3 months ago that I got a "real" piano (a digital unfortunately, but it's quite good I believe - Yamaha CLP 340, at around 3,000$ - very good key action) and started to take it more seriously.
Now came the problem with dynamics/agogics etc. (a problem I never experienced on the old non-weighted keys Yamaha toy-keyboard, for obvious reasons). First few weeks I was just getting accustomed to the new piano, the new weighted action of the keys, etc. I still didn't really have anything like a plan for development, I was just playing this and that, experimenting.
Lately though (the last 1,5 months or so) I've been more and more noticing how terribly I'm lacking in terms of dynamics, evenness of playing, etc. It never bothered me before, even though I of course noticed it. In my opinion this is mostly because I'm trying to play pieces that are far too difficult for me in terms of these aspects I'm mentioning. But since I am able to handle them "motorically" (like I said above), it's very tempting for me to keep playing those pieces instead of focusing on easier ones to improve on these things I'm terribly lacking in.
Now, you're probably thinking "why don't you just get a teacher and have him help you in this". Of course, I've tried. But here is how it has been going for me with teachers:
I've been to probably 6 or 7 different teachers in the past 2 months. In each case, upon showing them what I play (usually I play the part of the pathetique that I know, Chopin's minute waltz and the turkish march) and telling them how long I've been playing, the teacher becomes extremely baffeled, saying that they have never encountered an adult who never played as a child and who would demonstrate such a "level" of playing, and that they simply don't feel competent enough to help me (most of them were teachers with a degree, who have been playing for 20-30 years in some cases), and they refer me to a teacher who is in their opinion better than them. This has happened with every teacher I've been to so far, and I'm going from one teacher to a better one (at least theoretically better). Right now the last teacher I went to referred me to someone supposed to be one of the better teachers in Poland (I'm from Poland btw), a piano professor at Chopin's Warsaw School of Music (it's THE music school here in Poland), and I'm scheduled to meet him a month from now (he is on some tour at the moment). I'm having high hopes for that, but still I feel like I need to tackle this problem on my own for now.
So anyway, you can see where my problem might be at the moment. I am trying to develop all those aspects of playing the piano (dynamics, agogics, etc), but I'm not really sure how to do it. I have tried many different approaches (ones I found through tons of searching on this (and other) forum, but since I don't really have someone to guide me, someone who could tell me "ok this is the right way to go, please continue even if you don't see results quickly", I tend to get discouraged if I don't see noticeable results after applying 1-2 days of one method, I start to think it may be a waste of time, and then jump to the next training method. Because of this I'm sort of going in a circle, not really sure how to develop. I did of course do a lot of searching in this (and other) forums, but didn't really find anything specific, only a lot of different small suggestions by different people, but it's hard to draw a conclusion as to how to develop a progress plan.
What I'm mostly finding a hard time figuring out how to develop:
1. How to do nice cresc/decresc that sound natural and smooth and not "jumpy" (meaning, you almost feel like someone is gently turning up/down the volume with a knob, without any suddent 'jerks').
2. How to voice the notes evenly - so that all the notes have the same loudness when compared to each other, and this loundness only changes when I want it to (I find I especially lose this evenness when hitting the black keys - they come out accented almost always)
3. How to play in such a way that the notes merge with each other into one smooth melody (I'm not talking about legato playing here). Meaning - how to play so that you don't hear the 'attack' of each note, but it is kind of masked by the previous note (I don't have this problem when playing fast passages, definitely much more with slow passages where there are only a few notes repeated over and over, in the left hand for example)I have tried to upload some recordings of myself playing the pathetique and a few other pieces. I actually spent 6 hours yesterday trying to get a decent recording, but no matter what I do the recordings comes out muzzled (I have a poor microphone unfortunately), so I decided not to post at all than to post something that won't help you help me.
I would really, really be greatful for any kind of help here. I realize the questions I'm asking above are very generic, and like I said, I did a ton of searching in the forums (but came out with way too many different results, nothing I can "hang on to"), but I'm kind of stuck here, I'm definitely feeling that this forum is my only hope as of now.
All of this is even more frustrating to me because I have very sensitive hearing to music, and hearing myself play in such a way makes me simply want to play anything else just because my attention is then drawn away from 'expression' and I'm more focused on learning the new piece fingering etc.
What would be the best thing to do in your opinion? Keep playing what I'm playing and focus my whole attention on simply getting the sound I want, playing extremely slowly, and never speeding up until it sounds EXACTLY as I want it? Should I stop learning new pieces and focus only on the ones I know until I've mastred the dynamics etc. in them (that's what I'm doing now - I haven't learned a new piece in almost a month, because I don't see the point if I'm having trouble with the basics)? Should I do some sort of specfic exercises for the problems I've mentioned above?
Any tip is really the value of gold for me at the moment. So please don't hesitate to post ANYTHING. Even if it's already been said by someone, if more than one person tells me the same thing it's likely that this will reinforce my belief that this is the way for me to go. So don't hold back

If you have any questions, if there is anything I can do to help you suggest something to me, please let me know - if it's within my reach, I will do it.
Thanks, and sorry again for such a long post. Thanks to anyone who's made it this far!