I read in the Roswell fandom. My all-time favorite writers are:
EmilyLuvsRoswell
http://geocities.com/ntempest/
mockingbird39
(her site seems to be down right now - I'll come back with a link)
Rosdeidre
http://www.rosdeidre.com/
They are all excellent writers, with a great grasp of the characters and of storytelling. I think that any of their stories would be worth a read, even if you aren't in to Roswell.