I just got back from my annual trip to the simulator, and the flight was totally packed (of course). Lots of employees complain about full flights--they often miss flights, and when they do get on, they don't get to sit in First Class. Me, I've never done that. While a full flight means a travel benefit is more difficult to achieve, it also means the company is making money and my job is that much more secure.
However, there are some bad points to sitting in the back. I was glad to have an aisle seat, even if it was very much in the back. The really bad point came with the guy next to me.
Although he did announce that we were the lucky two who got to sit next to the guy with a 48 inch chest, he wasn't a totally unpleasant guy. He did ask about the Heller decision and otherwise had some small talk--mostly with the guy in the window seat.
He also had some obnoxious qualities. He got up four times--once during taxi out. What was really, really obnoxious, however, was his habit of raising his arms over his head. He didn't smell or anything, and he was wearing a shirt, but exposing your armpits for extended periods just isn't appealing.