Though he's far from my favorite, Big Show is pretty remarkable for a guy that size. I mean, compare him to other supersized guys like Viscera and he comes off like he's moving at luchador speed.
I also think people forget just how much Andre the Giant sucked in the ring. He was awful. Heck, I'd even say Show's got better workrate and a flashier move set than Hulk Hogan.
He's got a bunch of really cool moves, but he can't use a lot of them because they all look like finishers. When a guy that size hits someone with something big you figure that's the end of the match. Plus, I give him a lifetime pass for the superplex/ring collapse gimmick he worked with Brock Lesnar. It was an amazing spot and any 500-lb. guy who'll go head over heels and land on his back from 10 feet up is all right by me.