I just don't like the smell of it, and I've heard that most alcohol tastes bad as well (with the exception of Wine.)
Also, while I enjoy goofing off with friends, I want to still be perfectly mentally capable and aware of what I'm doing and what's going on. I hear too often about accidents and people doing things they wouldn't normally because they were incoherent due to drunkenness.
And for those of you who say that you feel perfectly aware while drunk, try doing some puzzles or something. I doubt you'd do too well on them
It mayfeel like you still have your common sense, but that doesn't mean you do. Although I could be wrong since I'm no expert on being drunk, hehe