Peach, but I can't seem to find it anymore. (I have a peach sorbet at the moment, and Ben and Jerry's does a peach cobbler ice cream, but I want plain peach ice cream.)
Really good vanilla (Ben and Jerry's definitely qualifies).
Cinnamon vanilla (from a place in Brooklyn that closed years ago; I am very fond of cinnamon)
Lemon, which might be worth using my ice cream maker (another that isn't very commercial, apparently)
But it's cool here right now, so while ice cream is almost always good--I'll eat an ice cream cone walking down Mass Ave in the snow--the pull isn't as strong as on a really hot day.