I've only heard the term "straightedge" once before (I know, I'm kind of out of things), and I suppose I really don't qualify anyway (as I do occasionally have a drink).

I didn't drink until I was 21, and still never drink to drunkenness. There are very few drinks I enjoy the taste of (though admittedly I haven't explored very much either). A glass of wine to complement a meal can be nice, and my wife finally go me to try a Smirnoff Ice, which I absolutely love now (I know it's a "ladies drink", but do I really care ?)

As far as the other vices mentioned, drugs are definitely out, I didn't have sex before I was married, and I eat as much red meat as my wife will allow (she tires of it more quickly than I. "Steak again? That's the fourth time this week!").