I think Kos is a bit of a douche in some ways, but I really love the fact he is so willing to fight regularly. I think the UFC lets guys sit on their ass too long, there is no way guys who are not injured should be able to get away with 1 or 2 fights a year. They are professional fighters, so fight for crissake.
Look at Penn, I should go back and see exactly how many fights he has had in the last two years, it can't be more than 4 or 5 tops. For all his trash talk about fighting, the guy hardly ever fights. At least Kos is willing to put his money where is mouth is, he has fought more in the last 6 months than Penn has in 2 frickin years.
I also think he understands how much that loss to Thiago hurt his title climb, and he knows he has to get back in there and get a big win as soon as possible.