Cranky is my fav, because it makes me feel a lil special when they act nice to me instead of being cranky. I like jocks a lot too. They are easy to build friendship with.
Well I pretty much find all of the personalities like-able. As far as favorites, Normal for female villagers, and Cranky for male villagers, with lazy at a close second. I don't really care for the Uchi villagers, I don't like virtually any of the designs unfortunately. Hopefully by the next game there will be some more appealing Uchis.