i think, music is a thing you can always to apart from your “real life” ... it’s a great fallback if you are stressed or pissed of with something or someone ...
i actually do have a band (http://www.planktonmusic.at - funny enough, i developed the page using CI :D) so i must know 
EDIT:
well, since some of you posted their instruments ... mine are: guitar, e-bass and piano pretty good, working on drums (basic rhythms are possible), singing (in my band and in some choirs) and some other instruments that i played once or twice but never seriously like the violin, sax, clarinette and some others