Yeah, I think the only one I just went for was the Pine 4 Pine because I love pining so much so I'm crossing my fingers I get lucky on there. The retrotv challenge does sound interesting- I nominated a few myself but I don't know if there are fandoms I can write for. Hopefully you find some that work for you, in case you decide to go for it! You are right on it being extra work though, and there is always an added pressure in writing for someone else.