When he's trying to think about something he usually just sits down at the piano and plays something simple repetitively. Sometimes it's one note, other times it's a scale or a simple song. The problem is I don't know what songs he'd play. It would have to be something he'd know by memory (either by years of practice or because of simplicity) and something he'd be able to carry on a conversation while playing and not mangle it horribly. I was thinking Ode to Joy, Pachebel's Canon, assorted nursery rhymes and so on, but what others? He's very skilled, like I said, so I'm looking for something more complex than hot-cross buns.
On the other hand, what's something more challenging that he could play when he DOESN'T want to think and just wants to play instead? He does some of his own composition and will sometimes play that, but what already written stuff would he play? I know he loves playing Rhapsody in Blue, but that's really it.
Also, does anyone know of any odd habits a pianist is likely to develop? My MC plays a lot and he plays semi-professionally, if that helps.
(And the year is 1985-90, if that changes anything.)
THANKS IN ADVANCE