Because of my background in freestyle wrestling, I got interested in Jujitsu, especially Brazilian style. I think one thing the "Ultimate Fighting Championships" showed was that to be a fully rounded "fighter", you had to train in multiple arts. Its a shame though that the grappling arts, since they aren't as "pretty" as the striking and kicking arts, don't get alot of exposure.
Grappling is ugly but effective. Stand-up fighting is all good and well, but lots of fights end up on the ground.