[krunchyfrogg]

I'd suggest Savate.

Boxing is effective, and you'll be able to kick anybody who isn't a trained fighters butt (this is true for any MA, IMHO). The problem with boxing is that you're trained to hold your fists in front of your face when on the defensive. Whicle this is great when actually boxing (and wearing gloves), it leaves you very vulnerable if you are street fighting. Any trained fighter will see that your fists are too close to your face. As Balintherlas says, if you get hit in the nose you'll be dazed. Without gloves on, your own hands can do just about as much damage as your opponents, and somebody would just hit your
"blocking" fists into your own face.