I have a confession to make. I generally enjoy the company of left-wingers to right-wingers. It's true. I love to have lively debates but the main observation I have about left-wingers is that they tend to at least think about things more so than the average person. Sure, most of their opinions are poorly thought out (grin) but I enjoy talking to people who have thought about more than what they've eaten today, what they hope to eat tomorrow, and what they've eaten in the past which seems an increasingly common topic with people as I get older.
When you get together with your families this week for Christmas, observe how much of the conversation focuses around tactical living issues (food, clothing, shelter, children). You may find it depressing.
That isn't to say that left wingers in general make interesting friends. There are plenty of left wingers who simply hate Bush for no particular reason. And if pressed get into mindless regurgitation (Haliburton, Iraq, Big Oil, Kyoto). But as a broad generalization, I just find talking to left wingers slightly more interesting. Though admittedly, many left wingers don't like their beliefs held up to scrutiny and get physically angry at the idea that people might disagree with them (global warming being a particular topic that will set some left wingers off).
In my family, the left right spectrum is pretty evenly split. We've got people who make Col Gene look like a libertarian and people who make Gideon look like a communist. It's all over the board which makes family get togethers lively with a common phrase being "How can someone as educated as you believe that X is true?"
And I'm the dumb one in my family.