Diego vs Karo was definetly best fight of the year and Diego definetly proved himself as a top level fighter in that fight. His striking has improved, his takedowns are good and when he is on his back all you can say about that is that he is just that much closer to turning it around so he is on top. That guy is slippery as hell. Karo is a great fighter but he just couldnt stay on top and his striking was not on the same level as Diegos as you can tell by the way their faces looked at the end of the fight. I wonder if Diego kept Karos tooth as some kind of trophy.
As for Diegos attitude that most people dont like. I like it and I think he is very good for mma because even if you hate him you wanna watch all his fights just to see him loose, and then after he dominates you just wanna see him fight again. I have been a Diego fan before TUF and I would love to see him get a title shot.
Koscheck is also getting a lot better and him versus Diaz would be a good fight for him and I have heard rumours about it, but I dunno for sure. He needs a test instead of fighting bums just to show his true skill. Right now I dont think he should fight Diego again, I think he would just lose again, but give him a year or 2 and I could see one hell of a fight.