I can't pick a "favorite," but some of my regulars are pistacchio (Hagen Daz), white chocolate raspberry truffle (Godiva), Raspberry Vanilla Swirl (Hagen Daz frozen yogurt, with champagne and Bach on a Sunday morning), Chocolate Chip Cookie Dough (Ben and Jerry's is better in my mind than Hagen Daz on this one), and Lemon Ice (Double Rainbow). A recent discovery is Hagen Daz Creme Brulee --very rich and yummy.
Dang it, I didn't pick up anything for tonight ... bad timing on this thread!