My favorites are banana (the real kind -- not the artificially flavored ones), chocolate, mint, fudge and vanillia, strawberry, and Caramel Cone (Haagen dazs <3). I tried a Salted Caramel kind at the Wizarding World, which was very delicious, so perhaps that one, too.
I once tried a rum-flavored one, and it didn't capture my taste, so I'd say I disliked that one most.