I don't think he really has a choice. Some people are just wired to be self critical and never settle, even if the result is pristine. I think it's a good trait to have. He'll never get complacent, he'll never be satisfied, even if he has a hall of fame career. It's a winner's attitude. I actually hope it's rubbing off on others. Dareus sure could use a dose of it.
Just my two cents.