Basically this election is about the transition from the baby boomer generation having the majority political sway to their children and grandchildren.
Honestly I've found that people in my generation (teens to mid-twenties) often dismiss the realpolitik of yesteryear simply because their parents bought into it. However I think placing so much faith in idealistic, young, inexperienced leaders is, at best a gamble.
I don't know for certain if Obama truly desires the change he's his campaign on. Or even exactly what the change is focused on. Many (some great) politicians have run on such things such as Teddy's Square Deal, FDR's New Deal, JFK's New Frontier, Johnson's Great Society. But all of them had definite issues that they addressed, if not definite strategy.
Unfortunately for Obama, he's a Catch 22. Of those that believe he truly wants change, some believe it shows his youth and inexperience. Cynics may think it's merely another slogan used in an attempt at power mongering. It's hard to decide whether he is innocent or insidious. Harder still to decide which one is preferable.
Other nations embrace him, but I wouldn't necessarily consider that a good sign for voters in America. Every politician serves their constituency, including those in other countries. What is good for them may not be in our best interest.
While it may appear I'm just bashing Obama (I am conservative) I'm trying to keep this in a non-partisan viewpoint. There's simply not much to say about McCain. He represents the status quo. We know the country won't break under his leadership. On the same token, he brings less opportunity for improvement.
Obama is a multifaceted gamble. On the first roll of the dice, we find out if he's truly practicing what he preaches. On the next, we find out whether or not that collapses this house of cards or solidifies it.
While I personally will vote along my Republican party lines, I also submit to the likelihood that Obama is our next president. Let's hope he doesn't screw this up. I'm fairly sure if there's a God, I asked not to be alive during a Great Depression.