This is courtesy of Steve Benen and Bill Simmon, who I think have arrived at the most meaningful reason for reasonable people to get their asses up and vote:
This year has had too damn many crazies in the running for me--people who aren't just counter to my own liberal values but seem anathema to sound, functional government. There are theocrats and borderline anarchists; people who believe that a woman's body should be regulated, but businesses shouldn't. If you want to show dissatisfaction with a broken system, start by voting against people who would break it further--ideologues who don't believe in government, facts, reality or honesty, people who shy away from simple questions and run their campaigns like a fly-by-night boiler room short-con.
I don't get why more people don't see the grift-factor in the background of this Tea Party nonsense. I really don't get why there should be an "enthusiasm gap" when there is so much to enthusiastically reject!