I consider myself very moderate, something I take pride in. But like someone said, more often than not it means agreeing with some parts of the left, right, and in-between rather than brokering compromises. Most of our problems are too complex for one just one partisan solution to be all we need. Democracy lends itself to compromise, but it's usually easier to bicker and go back and forth. I guess moderation is easier said than done. Anyone too far on either side of an issue tends to be "wrong," IMO, whether or not you're talking politics.
The sad thing is that most Americans are actually quite moderate, but the distinguishing feature of most of these American moderates is a disinterest in government. It's easier for you as a politician to develop a support base and stay in office by appealing to the people who genuinely care and are passionate enough to vote, protest, or volunteer, the people who actually affect government. These people are the ones with stronger political opinions, like Dems and Republicans, so they're the ones who get represented most.