I play:
electric guitar, <-- having lessons
classical guitar, <-- having lessons
piano, <-- having lessons
bass, <-- will have lessons once I'm grade 8 electric guitar (I'm not made of money!)
viola. <-- used to have lessons, miss them now so as soon as I find a private tutor I'll start up again
J'aime le musique! 8)
Inkfish, for a 'hobbyist at best' you have one hell of a good setup!
Pooky, I suggest the piano, it's got a real feel-good factor when you can go round someone's house, be persuaded into playing something on their piano and then gratefully applauded, even if you don't think you played very well...
*happy sigh*