Biggest single piece of information about me: I like the darkness. Seriously. I like fanfics where the protagonist's morals are iffy to start with or where the "Golden" hero's morals are corrupted. If the protagonist of the story or the setting has less morals than the usual person, then I am more likely to enjoy the work. This includes stories where Luke Skywalker or Harry Potter fall to the side of evil and corruption (my story is a good example of my kind of tastes when it comes to the "golden" heroes).
And, as everyone inevitably wants to know, because it serves as some sort of judgment on the writer, these are the romantic relationships that I support: Grissom/Lady Heather (CSI:), Mal/Inara (Serenity/Firefly), Erik/Christine (Phantom of the Opera), Cole/Phoebe (Charmed), Logan/Jean (X-Men)