I write for various fandoms, I'm a student who likes to waste precious revision time on writing. I probably ought to mention that although I have written some het, slash is my specialty.
Fandoms and pairings I like to write/read: (When I say I only like well-written stories for a certain pairing, that doesn't mean I'll read any old crap for the other pairings, it just means that for me to read that pairing the story has to be different from the masses)
Andromeda - Dylan/Harper, Tyr/Harper, Rhade/Harper, Rommie/Harper. No Trance, please.
Batman Begins - Batman/Scarecrow is one of the hottest pairings ever.
Big Wolf on Campus - Tommy and Merton are the slashiest characters I have ever seen on a programme that wasn't openly gay. And Merton is possibly the perfect male, despite not being as hot as, say... Johnathon Crane.
Buffy - Spike/Xander, Angel/Xander, Riley/Xander, Giles/Xander, Oz/Xander, Buffy/Xander, Faith/Xander. No Anya. Oh, and any femslash is good here. Especially with Dawn.
Cable & Deadpool - I love slashing these guys. They make it so easy. Homoerotic subtext spilling from every panel.
Dragonball Z - Vegeta yaoi rocks my world. In fact, any pairing with Vegeta (apart from Bulma). It's not that I particularly dislike her, I just have a distaste for the obvious.
Final Fantasy 8, 10, X-2 - Seifer and any guy. If it's het, I'll only read Seifer/Selphie. From FF10, I like Tidus/Lulu, Tidus/Rikku, Rikku/Lulu, or Lulu/Rikku/Tidus. I hate Yuna in 10 and X-2. For X-2 I like Gippal and the guys, or well-written Gippal/Rikku.
Harry Potter - DomHarry/SubDraco is my passion. I quite like Hermione sub-plots, but I don't much like Ron. Snape/Draco can be ok, when it's written well.
Justice League - Flash(Wally West) rules. Pair him with any guy, I'll approve. And a little Flash/Wonder Woman wouldn't go amiss...
Teen Titans - I love Raven. I'll read any pairing for her, het or slash, as long as it isn't with Beast Boy. I don't have anything against Beast Boy, but Raven can do better.
Xiaolin Showdown - Rai/Jack, Chase/Jack, Clay/Jack. I don't mind Wuya/Jack. I'll only read Jack/Kimiko if it's written really well, same goes for Jack/Katnappe.
X-Men Evolution/Comics- Pietro (alias) Quicksilver. Give him a nice (or nasty) guy and I'll read. I'm also happy with non-pairing stories focusing on his screwed-up family.
X-Men Movies - Bobby and John were meant to be together. Rogue should be shot.