RE: The Flavor... it's the flavor !!!
I'm not overly crazy about ice cream (too disallusioned after Ben and Jerry's stopped making White Russan) but I've been known to get downright selfish with BlueBell's Homemade Vanilla with Peaches during the summer peach season. Last year's crop wasn't exceptional, but usually it's divine.
Baskin Robbins used to have a Kahlua flavor that was awesome (sense a theme here? LOL) - a rich vein of Kahlua-y goo in vanilla ice cream.