"So maybe it's OK to let the grandiose things that an Obama presidency could represent overwhelm the less-stirring reality -- i.e., Obama as more or less a typical middle-of-the-road Democrat with a lot of money and a well-run campaign. Maybe it's OK because it's not always about the candidates; sometimes it's about us, what we want and what we want to believe. And if Barack Obama can carry that burden for us, why not let him? Seriously, why not? The happy ending doesn't always have to ring false."
Disclosure: My ranking is Edwards, Obama, Clinton. Maybe stick Chris Dodd in before Clinton due to his recent filibuster stunt, which I thought was pretty awesome. One the whole, I'd rather have Edwards in office due to the fact that he's selling himself more on his positions on the issues than on his personality; I feel that he has stronger positions on economics and the environment than Obama does.
But that doesn't mean I'd have any qualms about voting for Obama; I think he's a solid and charismatic candidate, and that may matter more in this race. For that matter, based on the current front runners, I feel pretty confident that whichever Republican wins is going to be a complete train wreck in one way or another. Hillary Clinton may not be my ideal candidate, but compared to Huckabee, Romney, or Giuliani? No contest.