Back when I lived in the dorms I used to buy a bottle of pepsi out of the vending machine then drink about a third of it, refill to top with vodka, shake, enjoy.
I think that must be my favorite mixed drink ever because I've had it more than anything else (because I don't drink mixed drinks) and it isn't too girly (that shit was gnarly as hell, especially the swill at the bottom).
I haven't made/ordered a mixed drink in a long time. I steal other people's at parties but I usually can't figure out what they are so whatever.