Mint chocolate chip is a serious standby, as is chocolate chip cookie dough! I've been eating way too much ice cream lately haha. I also got Oreo and Mini M-M ice creams lately and those were amazing.
Always, always always always will be mint chocolate chip. Ever since I was a kid, nothing has topped it since. Also controversial, but I can appreciate banana ice cream.
Mint Chocolate Chip is one of my favorites, but honestly if I'm eating ice cream I want it to be a DQ Blizzard or something of the sort (with crushed up pieces of chocolate or candy in them).