What's your favorite mixed drink (that's pretty simple to make)?

Short backstory, if you're wondering: My college has a big sib/little sib program where freshman are given a secret big sib who, for a week, leaves presents outside their door. This is the week for us, and I've been given, in addition to presents, sketchy notes telling me things to pack for friday night. I also got a survey with one of the questions asking about what drink I like. I've figured out I'm basically going to be given a lot to drink, and need something that tastes good enough that I wont mind (as much) being given ridiculous amounts of it. And I know few places with as many pro drinkers, so I figured this would be as good a place as any to ask what I should...well, ask for.