I have some times when I was a kid, but not much since. I got into a fight with a miner a few years back and that ended well with me sitting on top, punching him in the face. It was part thanks to my girlfriend, though. The guy jumped me from behind as I was leaving the pub and she got him off me so I could fight back.
It certainly did feel good. I'm not a particularly big/strong guy and there's plenty out there who'd kick my ass thoroughly, but I seem to have had some luck and perhaps the experiences from my childhood years are still some help. I know some dirty tricks.