I need to write more longfic

I keep seeing that WIP meme around my f/r-list, and thinking I should do it, only to realize that I only have like two WIPs that I'm even sort of working on. Hmmm.

Anyone have suggestions for fandoms (other than Harry Potter) that could really use some long plotty (even if the plots are ridiculous) fic? I'm just drawing blanks on A:TLA and my other usual fandoms for this sort of thing. *cough* Though if you have a great big ridiculous A:TLA plot you don't feel like writing, feel free to pass it on. . . .