Ooof, I don't really drink pop anymore, but here would be my list:
Prerequisite: all must be with a large glass of ice. Aluminum tastes like garbage.
1. Sunkist, Squirt, Dads Root Beer
2. Sprite, All other Root Beers
3. 7-up
4. Coke and all products that are like it
5. Mellow Yellow, Mountain Dew