My favorite ice cream changes with my mood or somethin, variety is the key. Some notable flavors:
Chunky Monkey
Mint moose tracks
Rocky road
Macha almond fudge
I find most of the Ben & Jerry's offerings to be quite excellent.
However in my area we have a chain of convenience stores called United Dairy Farmers which offers a cotton candy flavored ice cream ... best stuff ever! I especially love it when turned into a milk shake.
Chocolate-chip Cookie Dough w/ Melted Fudge chocolate, Pieces of peanut butter cups, Brownie Chunks, Oreo pieces, Carmel. All in a chocolate dipped waffle cone with whip cream and chocolate sprinkles. Oh, I forgot gummie bears, sour worms, chunks of peanut butter and A lot of hot fudge.