Right now, my favorite flavor is that banana flavor that Coldstone Creamery has. Don't know if anywhere else has that flavor, but they do and it is just so good, I love it. But overall, I think my favorite would be vanilla. Rocky Road is another good flavor in my opinion. I like a lot of ice cream though.
I had hazelnut ice-cream the other day, it was so delicious, I'm considering updating it to favouritest favourites status, otherwise I like tiramisu, intensely chocolatey ice-creams and almost anything that's really tangy. I really want to try gelato di riso / Italian rice ice-cream because I imagine it tastes like torta di riso - which I love - but I don't think you can find it outside Italy.
Sounds really boring, but I just love plain vanilla bean. So simple and refreshing. I do however like the new flavor at Scoop DeVille in my town--peanut butter and jelly. YUM.
There's a brand of ice cream called "Blue Bell" that's only sold in some US states but, they make an ice cream flavor called "southern blackberry cobbler" and it is amazing. I love blackberries