Hey, Mr. Plague O'both Your Houses -
Every time you get all indignant and insist there's no difference between sides, you are excusing yourself from the duty of actually thinking about it. Every time you open your mouth to illustrate that you aren't thinking about it, you're demonstrating to everyone around you that you aren't a thinker. There are millions of people whose lives are arrayed around the differences between this side and that side and I guarantee you - they've thought about it more than you. And when they come up with a different answer than you, that should fucking give you pause.
I know how hip it is to be apathetic. I know what an edgy thing it is to vote for Ross Perot. But you're losing sight of the fact that your grandmother's roommate at the nursing home votes, and she votes for whoever Fox News tells her to vote for. So you can act like you're above it all but the only person you're fooling is yourself.
And you should be better than that.