We always got Dad's Root Beer as a kid but I never knew they did other flavors.
When it comes to the usual fruit flavored ones, I was never too picky. Had a lardass friend in elementary school that loved Sunkist, and I'd laugh because it had the single highest amount of sugar per can of any common soda. I guess that might have been my favorite orange soda too, excluding rare occasions where we'd be treated to IBC or Jarritos or something.
I LOVED store-brand pineapple soda though, we used to get that in those 3L bottles all the time and split it between all the siblings every weekend.
Welch's had the best grape soda iirc. Oh, and their strawberry, shiiiiiiieeet that was good stuff, forgot all about it until I googled them, apparently they don't do soda anymore.