mountain dew is the best...it is great by itself, or mixed with just about any other flavor.
xtreme gulps are my best friends...52 oz for only a buck, it doesn't get much better.
pina colada is the devil. not only is it disgusting, but it contaminates it's barrel for like the next five flavors (there is nothing worse than having your orange cream [the next best thing to dew] taste like coconut.
the crystal light ones also suck!
however 7-11 employees are some of the coolest people on earth!
Edit to add: icees are cheap bastardized slurpees. they are to airy for me, and they're everything that's wrong with sugary-frozen drinks.