Watch out, Tom Coburn...
McCain's trying to take your "Most Angry Insane Jerkoff" badge.
I'm mostly in the "he was never that great to begin with" camp, but I do remember a McCain interview with Jon Stewart a few years back when he was talking about the importance of green energy to combat air pollution and thinking he came off as intelligent and decent.
It truly is a shame that he's clearly been neither in more recent debates. Not liking a guy and wishing he would forego petty grievances to preserve some sort of legacy are not mutually exclusive things.