Not only that, but in the LSU challenge, Carlos specifically wanted the grill (or whatever area it was that he ended up using), even though Shirley called it first...and she ended up having to use the oven and change up her recipe.
And then when it came time to cook his fish, Carlos wanted to use Nick's oven (the one Nick had been using for the entire time, just like everyone else had sole control over their areas...this would be one reason why Carrie got stuck doing a "cold" dish...she took the area that no one else wanted because she had immunity) and Nick said "no". I thought Nick was completely justified. (And I thought Carlos was deluded when he said that "Nick is only thinking about Nick". Well, duh. It's a competition.)
I can't figure out why Nick is selfish for not giving up his oven or wanting to give up his knife, but Carlos isn't selfish for expecting to use what Nick has.
(And as recently as the LSU challenge, the immunity winner had the worst dish, but wasn't even called as part of the bottom three...because she couldn't be eliminated. The only reason Nick was there was because it was a team challenge. I say that it's poor planning on Top Chef's part. And I thought Tom was out of line for wanting Nick to "fall on his sword". Don't blame the chefs because the challenge was set up incorrectly.)