For me Aoki is the best MMA grappler today. He goes in there grabs a leg and holds on to it, until it's over. I don't see that from anybody else out there.
I agree, with the caveat that he's the best submission
grappler out there. There are a few other fantastic grapplers out there that use it more for positional control than as a means to a finish...Aoki is grabbing you for one reason and one reason only...to twist the appendage off.