I like a lot of the AU's in Undertale, personally though I like I think it's called asylumtale? It doesn't get much love but it's a pretty cool concept, also handplates I loooove handplates :)

I like a lot of AU's Horrortale, Underfell, Aftertale & reapertale but my favourite has to be Underlust!! X3 I just love the problems the au deals with and I know not a lot of people gave it a chance because of the creator and the first glance of the AU but it truly is just my fav! ><

Gotta be Inktale for me

i love fresh sans!!!!

Underfell for sure. Most of the designs are simple, but they easily convey the vibe of the au

underverse!

HMM.. I think it's Outertale, Underverse, Underswap:D

It has a lot of AUs that i like, but what i like the most is Outertale and Underverse!! The part of an outertale is that i rlly like space (a lot..) and Underverse is just that it really interest me because of an different AUs character fighting eachother and it reminds me that im watching anime for some reason XD

I like undertale, outertale, underfell, x-tale, underswap, flower possesion au and underfresh!!

I ADORE fellswap gold, swapfell red, swapfell kh, and horrortale <33

Tbh I really Like Underfell bc the colors and the edginess of it XD and it's cool how Flowey actually is with you on the adventure and isn't evil! ^^ but the story of Dreamtale is also rlly good and both Nightmare and Dream are awesome characters!