The Finish-a-thon approaches

Okay, I'm planning to participate in the finish-a-thon (at multific) this year, rather than attempt the au_bigbang like I did last year.

But I don't want to make it too stressful, either, because my Muse vanishes when that happens. Still, I'm pondering what I might do that is more fun than dutiful. Of course, as ever, I have more plot bunnies than I know what to do with... but some are more solid than others.
( Here are the leading contenders )

So... that's sixteen ideas, which I'd like to cut down to between three and ten... what do you think?