I really enjoy Yuletide because it gets me to write things I wouldn't otherwise think to. Getting a story is nice, but I'm really more interested in the writing. The list of nominated fandoms and characters can be found on AO3, linked from a recent post in yuletide_admin. There are a lot of fandoms.

I'm pretty sure that the archive of Yuletide stories, going back to the beginning, is linked from the community profile.