I am on the far-left. Well, in Canadian terms, I would be just on the left, but in American terms, waaaaaaaaaaayyyyyyyyy over on the looney lefty side (our center is closer to your left). I will most likely NEVER vote for the Conservative Party, because I disagree with them on way too many issues, and probably vote NDP every time (or maybe Liberal if they had a REALLY good candidate). I try to see the other side, I really do. But, we can never look at things objectively. We always look at them from our own frame of reference (my side being the liberal atheist with libertarian socialist tendencies (please don't make me explain it, just let me use "far left")), and cannot see the other person's frame of reference. So I take an issue, say gay marriage. I look at my side: Our Charter of Rights and Freedoms prevents discrimination against certain groups (I'm pretty sure sexual orientation is included in either it, or a subsequent piece of legislation). I personally have no problem with 2 gay people marrying, why should I? Is it any of my business? Let them marry. Now I try to look at it from the other side. They oppose gay marriage because...(keep in mind that I'm in unexplored territory here)...um...something in the Bible? But we have separation of church and state. The government shouldn't be legalizing religion, they shouldn't be in people's bedrooms...(me drawing a blank)...I guess they have to be brainwashed jesus freaks. I just can't see it from my reference point, plus I disagree, which makes me think that the only explanation is that they are dumb and/or brainwashed jesus freaks. Especially when religion gets involved, because I'm an atheist and don't know too much about Christianity, or any other major religions beyond a few tidbits.
I won't change my opinions to become more moderate, and I won't be ashamed to be called a liberal, because I believe what I believe, from gay marriage to universal health care to marijuana legalization. I guess part of why people like me who are far on one side (and proud of it) find it harder to see the other side because the other side is further away, and obscured by the fog of your own opinions and frame of reference. Now add the fact that most people tend to cluster around the middle, I guess I am noticed more, because there are a lot more people that I disagree with, or are just way too far apart to ever find common ground.
And no matter how badly you were crushed in a debate, you think you won because A: you think the other guy is full of crap and just plain wrong, or B: you (like most people) have a tendency to want to hear yourself talk (especially when it comes to politics) and not listen so much (or just want the other guy to shut up). Case in point: Bush and a lot of Republicans thought he won the first debate.
It is simply damn near impossible to be able to analyze an issue objectively, because you need a frame of reference. And all of ours are different.