The passenger in the waiting area who just has to come plop down on the row of seats with me when there are like 50 empty seats between the one I'm in and the gate. Of course the seats are wobbly and the guy likes to shift his lard @ss around every 10 seconds, creating a "moderate sea state" with the back of the seat thumping me in the back, thighs, etc. You get the picture. I know I'm just catching a ride home, but I sit WAY away from the gate seeking just a little solitude. And it's usually the fattest guy on the plane. I spend the next 30 minutes silently praying that the only available seat isn't the center one NEXT to this guy...