Ok, usually topics like this refer to ice cream, so I'm guessing that's what you mean.
In ice cream, I'm a classic Vanilla lover. I've also taken a liking to Strawberry.
But overall, i find chocolate ice cream really nasty. In my opinion, it taste nothing like a bar of chocolate, chocolate milk (you'd think they'd be the same!), or frosting on a cake. It's just meh.
But if you mean flavor of everything, chocolate tops all. Drizzle, frosting, coating, bread, dough, milk, or anything else, it's just plain awesome.