For years, I always choose aisle seats, on the left side of the airplane, as far forward as possible. I like window seats, I like the view, but I am a large person (okay fat) and I can lean into the aisle but I can't lean out the window. Recently I have taken a window seat a few times. I do enjoy the views.
I have two pet peeves on window seats.
1: People who sit in the window seat, and close the shade. I like to look out the window, even if I am not sitting next to it. I take pride in NEVER having been airsick, part of that is being able to fix my gaze on points in the distance, harder to do when the shade is closed.
2: Windows you can't see out of, if you are more than 5'2" tall. This was a new 737 - 800 and I can't see without craning my neck. On the connecting flight I was on a small regional jet with a nice window higher up on the wall and easy to see out of.
What is your pet peeve about flying?