I loved doing Yuletide and recommend it, though I've slipped up with registering the past... few years, woe! In the hopes of being on top of things for Yuletide 2019, I've already started my letter and devoted some thought to what I might offer. I've received great TWEWY fic for Yuletide in the past, and was glad to see it had a single-fandom exchange run this year. If I'm really, really on top of things in 2019, maybe I'll try joining in if it runs again.