Wow, lot of writers here. Well, I've been writing fanfiction for almost a year. I like FF.net because of the wide variety of fics it has, and because the feedback comes in so quickly (The Dark Lord of the Fluff needs his daily review fix, DANGIT!). I have several fics in progress, but have only posted one so far.
Nicholas Bledsoe's FF.net Page
I mostly read and write Evangelion Fanfics, especially Asuka/Shinji fics, but I'll read anything in the WAFF (Warm And Fuzzy Feeling) category, and have been branching into other subjects.
I am also writing a sequel to one of my friend's DBZ fanfics which she added on as the next chapter (2 more to go!)
Mashed, Mangled, and Mall(ed) by a Princess