Hard to say. While Enchiladas are definitely pretty gross, I do like both burritos and Chimichangas. I always fry up my tortilla a bit to make it crispy but its always pretty much halfway between the 2, so I go with Burrito.
Yeah Enchiladas are literally the bane of Mexican cuisine, fucking disgusting, I don't know what that red sauce is but it tastes gross as hell.
Burritos and Chimichangas are very close for me, too.