Since everyone else is offering their 2 cents, I may as well jump in for what it's worth. Maybe 2 cents or less.
Obama is a personality kid. No substantive information on the important issues such as how to end the Iraq occupation, sub-prime problem, campaign finance reform, election fraud, stem the tide of recession/depression, bring down the national debt, keep the jobs from going overseas, tariffs, trade malfeasance and racial division.
His bone-headed mistake was to try to attract Reagan Democrats by even mentioning Reagan in a positive light. Big mistake.
Hillary wasn't talking many specifics either. She is more of an executive the Obama and since we call the president the chief executive, this makes a difference in her presentation for better or worse. She tends to be wonky and general at the same time. The deal with her defending her vote on Iraq is that she thinks she is liable to run against McCain who will hit her with the issue of "national security", a trumped-up canard but one the Repubs will run on. Of course it will be Billary. The only positive note is that this couple is economy-hip. They had Robert Rueben and Robert Reich as consultants and they were able to bring down the Deficit. Also, people were better-off financially during the Clinton years. This was not due to Republican policies of the past, that is a joke.
Either of the front-runners have the specifics that Edwards talked about but they are not sexy enough to interest the American public who would rather analyze personalities. (Maybe American Idol should run the elections.....I'm not serious)
McCain will bring this country to ruin because he is more of GW Bush. The rich corporate types will benefit and the middle and lower class will be screwed. He hasn't a clue as to foreign policy and wouldn't know an Islamist if he were bit on the ass. All he knows is bigger weapons, bigger military industrial complex and saber-rattling chest-beating. He may be a victim of the Stockholm Syndrome in which he would act like his captors at the Hanoi Hilton.
Both candidates could keep the US military in Afghanistan (another ruse) and possibly invade Iran (but this depends on which way the wind blows them). Anyway the old French expression applies to this election season, Plus ca change, plus c'est la meme chose (The more things change the more they stay the same).