Oh yeah, I forgot all about Dr. Pepper.
Tonic is great too. That stuff is terrible alone, but mix it with some gin or vodka and some lime or lemon juice and oh man.
Vermouth is a great mixer with gin and vodka. I love martinis.
But if you mix strong, hard liquor with green tea, you will only taste a hint of the alcohol. It's like you can taste the flavor of the alcohol you use, but not that alcoholy kind of feeling if you use cheap stuff.