I don't eat a lot of ice cream, but when I do it has to be Ben & Jerry's New York Super Fudge Chunk. It is hard to find in the stores around here, but has a nice combination of rich chocolate ice cream, white & dark chocolate chunks, and pieces of walnuts.
If I go to Dairy Queen, it has to be the Peanut Buster Parfait with vanilla ice cream, peanuts, and hot fudge.
Oh great! Now I want ice cream.