Nah, it's a team sport. You don't do anything or achieve anything in football without your team-mates, no matter how good you are. I think that single-minded, driven thing is great if you're a tennis player or an athlete, but you have to have respect for your team-mates and your place in the team in football. Messi and Ronaldo can't do a thing if they don't get the ball. That's why they pretty much all say 'I'm just happy to help the team' or 'it's not about me, it's about the team'.
As most of us probably have, I've played a few team sports at a very amateur level, and the dynamics of the changing room are absolutely crucial. If someone walks around like Billy Big Bollocks but doesn't back it up, other players just lose respect for that player and it becomes an issue.
Kev's had the penalty thing. He also got sent home from training by Unsworth. There's probably other stuff I've forgotten. He drives around in a gold Bentley. I don't think you need to be particularly adept at psychology to have a rough idea what kind of person he is from those various bits of behaviour.