General Wesley Clark is one of the people who thinks he should be President. People I know who served with him say he is smart, ambitious, and they don't like him. That seems to be a widely held opinion as indicated by this piece I lifted from the Ace of Sapdes blog:

Interviews with a wide variety of current and retired military officials reveal that Clark was disliked by only three groups: Those whom ranked above him in the chain of command whom he ignored, his peers at the same rank whom he lied to, and those serving beneath him whom he micromanaged. Other than that, everyone liked him.