I've been joking that I like John McCain too much to want him to be President. And there's a lot of truth in that--I lived in Arizona when McCain was first elected to Senate, and I volunteered in his 200 campaign. He's a good man, and even where I disagree with him, I believe he is honorable.
But the real truth is that the Republican Party has lost the right to govern. It may be unfair to blame the shenanigans of Bush and congressional Republicans on McCain, since he railed against of lot of it at the time, but this isn't about fair. It's also not about silly ideas like "it might help the GOP to be in the opposition for a while," or "it might make them wake up to be..." then filling in whatever you happen to believe.
No, this is about America, and what happens next. The next President will face a difficult and changing world. The financial situation is bleak, not just because of the immediate credit crisis, but because of China, all the debt Bush has run up, and a host of other troubles. I don't know that Obama will handle it better than McCain, but I think he will have a lot more flexibility, and a lot more talent to draw upon. McCain would face a hysterical opposition, and, yes, his age is an issue. He would also be backed by a party that doesn't really believe in him, and--as I mentioned--has lost the right to govern.
So I voted for Obama. It was in California, so it didn't really matter much, but I hope he wins, and I hope things get better. Yes, I said "hope."