there are really too many to list. but a sampling may be educational.
reading. i think of reading as my lifeline. if i don't do enough of it, i wither and droop and generally become less of myself, somehow. within the realm of reading are particularly spectacular addictions, some to authors, some to a series of books or comics, some to a style or genre... my favorite genres are speculative fiction (in which fantasy and science fiction are included, and also things like magical realism and mythology) and young adult/children's fiction. oh. and history books. i'm *very* addicted to history. but i like things from other genres as well. it's hard to explain. but by far i probably read speculative fiction the most... guess that at least partially explains how, last year, i ended up as President and Skinner of the MIT Science Fiction Society. but i'm not anymore, having graduated and all, so now i'm only the Thunderbunny. if you care to hear about my life in literature, go here.
when i'm not reading, i'm often gaming. i like games. most kinds of games, in fact. i'm currently writing an Assassin's Guild game based on the movie Casablanca, and playing in a whole slew of table-top roleplaying games.
and i haven't even begun on music yet...