I know people who aren't voting today because they feel uninformed on the candidates. I've heard this many times. The feeling that it doesn't matter anyway. All it leads to is apathy and cynicism.
What it boils down to is laziness. We go out of our way to make sure we don't miss out on who got cut from Dancing With The Stars or American Idol, but we don't bother to spend a little time looking into the issues. We were bombarded by an unprecedented amount of deliberate misinformation via negative campaigning this election cycle, with the promise of even worse to come in two years. It only takes a short internet trip to Politifact.com or Factcheck.org to find out what is true and what is not in these ads. Votesmart.org has tools to help research candidates and their views. Most of us simply don't feel like spending the time to do it. Out of laziness, many people vote for candidates who do not represent their best interest. I've spoken to people who are fired up, wanting to repeal the health care law, but who don't know what is in it. The information is out there, and if you have a computer and internet connection, you can become informed in short order. I guess whoever is going to be your next governor or representative is less important than taking care of your crops in Farmville.