Selfish is knowing you can't win (and there can be little doubt that he does), but stubbornly refusing to allow a fellow Republican who can to save the state from the clutches of the Democrats to hold the office he wants for himself but can't have.
I'm not star struck (I'm in the entertainment field, and I have worked with celebrities...and I've never been a Schwarzenegger fan anyway); I didn't start out with an unfavorable impression of McClintock, but the longer he demonstrates that he does not love California enough to bow out really does bother me.
When President Bush was running, a reporter said of him that he saw a man who loved America more than he wanted to be president. McClintock would impress a lot of people if he allowed California a Republican governor - for the love of the state, and the love of the people. But it really doesn't look like he's selfless enough to do that.