I was on the AT fandom train a lot longer than I was on SU's. I dunno, I got burnt out on steven universe a lot quicker.
I think SU is a lot more consistent and more focused, both of which are great. But I feel like Adventure time's pre-season 5 or whatever format of weirdness and monsters appealed to me a lot more.
SU's hiatuses didn't help. And neither did romance from the get-go.