Well, my aim is to simply have fun with it. Basically play for me and my enjoyment - this is what I do with my guitar. Never took a lesson, just youtube and tabs; don't know any musical theory, and I have fun with it, as a hobby.
Space issues dictate that a full piano is out of the question. In fact, I won't even be playing the portable keyboard/piano on a table or similar surface, but probably on my lap, sitting in my bed

I definitely want to play Classical music, while popular music is less of an interest, but still something I definitely want to do - like say Coldplay or even classics like Van Halens jump - which made me think keyboard. But then again, I play a classical guitar primarily, and I play everything from Metallica to Yiruma on that, so I can live with it not being "authentic" - though it would be nice

I'm leaning more and more towards the NP-31 - from what I read, in that price range, this should be some of the best available? Anyone care to dispute or confirm this?