First of all, many thanks for your remarks!
@pianistimo
You seem to have very profound understanding of piano playing in general, are you a teacher and/or professional player? I don't know people on pianostreet very well, as I'm only an occasional visitor of this forum.
Appassionata:
I agree with molto-marcato concerning the tempo changes which are a bit excessive, especially in the coda. This was mainly due to the fact that I usually tend to exagerate things in life 'concerts'. In contrast to when I play or practise all alone, I know that the audience (mainly consisting of laymen) is fond of such things ;-)
I think the issue was that at the beginning of my performance I wanted to avoid overly fluctuating tempi, so I really counted the pulse when playing the first few bars. By the time I 'forgot' my intention which led into a total rhythmical mess at the end.
Moreover, I am confused when listening to Appassionata played by different artists because the performances range from almost excessive rhyithmical accuracy to wholly unfettered interpretations.
Concerning your comments on the trills: I'm sorry, but I don't really understand the issue about on which note to begin the trills in classical music. I didn't grasp the problem with the e natural in bar 3. In fact my knowledge of musical theory is very limited (in fact, I'm a real philistine): When I started playing at the year of 8, I didn't fancy practising and showed no talent, so I gave up piano playing when I was 12. Four years later I restarted practising (several hours/day) on my own and finally took an additional 3 years of lessons. So now I'm 23 and passed my last piano lesson four or five years ago. Knowadays I just play for fun and don't care too much for details. As for both, the Appassionata and the Ballades I have the Henle/Urtext edition, which is not of greathelp either.
Ballades:
You're right, I should have played several passages more piano. There were some notes which a played way too loud. Perhaps it was partly due to the unaccustomedly soft action of the piano, at least compared to the heavy action of my own piano.
I'm not sure what you meant with your drinking/rollercoaster comment? I just thought I used to much rubati in general, but you say they were rather misplaced.
Piano:
The piano was a nearly 100 year old but completely revised and freshly tuned Bösendorfer.
Sitting position:
Unfortunately the bench was at its lowest position and still too high for me. I really didn't feel confortable.