At least from my experience of GMing, some of the best fights I've had between participants in my RPs has been fights in which people have traded blows rather than gone with the route of channeling Nero of the Matrix and dodge everything.

It's not that I take some sadistic pleasure in reading about cast members beating the living snot out of each other(alright, I do a little), but I've experienced that fights where both end up injured tend to create the best spirit between the RP's participants. At that point, whoever wins is just a minor detail as they're both in the dirt with broken bones and missing teeth anyway :P

In fact, members who partake on such fights tend to later become better friends from what I've found.