loads of stuff. Now-a-day I mainly play fighters and RPGs, but i dont mind messing around in other things.
Only other fighters I've put any real work into are GGAC, SF4, SC4, MBAC (Melty Blood Act Cadenza), and CvS2, respective to the amount of work I've put in.
I play a bunch of stuff online on GGPO, mainly A2, A3, 3s, and sometimes Super Gem Fighter (lol). I realistically could say I play brawl, too, as much as I dont like to say it.
But yeah, I play alot of stuff. I dont play melee as much as you probably imagine, especially since I'm not pro or really anywhere near it. (Heck, even most pros dont play melee as much as alot of people think considering how the game and the community works)