Lots of buzz about Cliff Schecter's new book “The Real McCain”. It certainly supports what I've heard — that he's a real hothead. For example, McCain Once Physically Attacked Fellow Congressman. And there's another alleged unsavory episode here, which the author says is vouched for by three witnesses, but apparently McCain now denies it.
Are these disqualifying issues? Not alone, no. But they are not exactly encouraging either.
Bonus McCain bashing: Senator Straight Talk Won't Go on the Record with Project Vote Smart — he's on their Board and he won't answer their questions! Wait, make that he was on their Board.