I've never met an icecream I didn't like, hopefully the Harry Potter jelly belly shit never makes its way to icecreams.
If I had to pick, I'd say if I'm buyin a tub, it's peanut butter, preferrably with absurd chunks of frozen peanut butter in it. If it's a little snack to hold me over, the two above, choco taco, cap'n crunch bar, or the "king cone"