I tend to stick to canonical backgrounds or later divergences with most of my fanfic reading/writing, but a good AU can drag me in. Which AUs do you almost always click on when you see it in your fandom(s)? Or what sort of AUs do you always want to write?
I love Undertale for itself, but I might love it more for how much it inspired people. Written fic, comics, music, AUs of all sorts? Any time a media does this, whether or not I enjoy the original or what the fans make, I think it is good.
Papyrus is the best too. He’s so powerful he won’t even accidentally kill you, unlike poor Toriel.