My problem is I don't agree completely with either party, so feel I'm getting screwed (to a greater or lesser extent) no matter how I vote. I hate the 2 party system, and would like to see "lesser" political parties such as the Reform Party, Constitution Party, etc., have more pull. In '04, I voted for a third party presidential candidate out of principle.
I think it's a safe bet that many if not most Americans are single issue voters or at least vote based on a select few issues... For example, Evangelicals are more likely to vote Republican because Republicans overall represent "Christian values." Which means no to gays and abortion, yes to faith-based this and that. For them, the economy plays second fiddle to whether Henry and Bill are allowed a civil marriage. Some people vote Democrat because their father did, and grandfather before him... Some guys (and gals?) probably voted for McCain/Palin because they thought Palin was hot. And for all of the above, that's their right.
I'm not politically savvy, and I am one who chooses candidates based on a few issues, my personal liberties as a gay man being one of them. Another being having strong worker's unions (I belong to one). The fine details of politics bores me, and I don't spend a lot of time dwelling on the subject--I'd sooner debate religion.