I prefer the exit rows, since there's more legroom. But since we have kids now, we can't sit there. So, we go for the front of the plane. We always end up waiting for everyone else to get off the plane before we get off, just because we have so much crap, so it's not a matter of wanting to get off the plane ASAP. I'm just more comfortable up there.
I refuse to sit in the back of the plane. We got stuck in the last row coming home from Bermuda on our honeymoon because our original flight was cancelled. Man, did it suck back there - loud, stinky (right next to the bathroom), hot...is was miserable.