Beside selfish/self-centered people like to occupy other's seat before asking to swap, I often find some selfish window-seat passengers like to keep the window shade wide-opened at all time even though most of the passengers are already in the sleeping mode or watching movie/TV. (I am talking about the long hault flights like 10 hours+, and don't care much about the short haults.)

Sometimes I wonder if why people don't want to use the reading lamp when they are trying to read. I really don't dare to open the shade when everyone else (or even only the passenger sitting right next to me) is sleeping/taking a nap or watching movie. Even though sometimes I have an idea of just opening the shade for couple of seconds to see the view by curiosity, especially the polar route (ORD-HKG), but I never dare!

For the 747-400, new config. C-class seats, there are actually 2 lights for your comfort of reading (the over-head light and the white light attached to the seat behind your head rest), but I hardly see people using the white light; they just simply open the window shade.

I used to be an aisle seat person, but I came across with couple of annoying window-seat passengers kept opening the shade from time to time, like every 15 minutes. I found it even more irritating than keeping it open at all time since the sudden strong light in the almost totally dark upper deck cabin really hurts my eyes!

After couple of incidences with the selfish window-seat passengers, I always choose to seat at upper deck window seat and have full control on all the window shades right next to me. Few months ago an aisle-seat lady who sat right next to me asked me to open the shade in order for her to read, I told her that I wasn't going to because I was about to take a nap. She insisted that I had to open the shade for her and demanded me to put on my eye mask if I wanted to nap, so I told her "now I wanna watch TV, I cannot even see the screen if I open the shade. If you have any better suggestion, wait until I finish the movie.", so I put on my headset right away pretending deaf.