Prefer flats, will eat both - agree with Dean-O. Crispy is a must, the hotter the better.
Locally, there is a place a called The Peanut Bar - wings are "ranked" #6 n the USA. The sauce is FOAMY!!! WTF is that?!?! They do serve them crispy, but the sauce was a real letdown.
Local bar called Brewer's has the best wings around - usually crispy and their Death Sauce is tasty and quite spicy - i can order an extra to ensure full coating/finger lickin'.