Window seat without a window
Depending on how long the flight is and if I am flying in a series of connecting flights, I will select a window seat or an aisle seat (the middle seats are terrible). In a big aircraft like Boeing 747s which have 10 seats per row (divided in a 3, 4, 3 groups) the middle two seats of the of 4 seats are the worst. Window seats are when you empty your bladder and want to get into a cave and not move until you reach the destination. Although the aisle will be in easy access for the aisle seats and you can easily get out when de-boarding the aircraft, but you also need to get up whenever the other two people wants to use the bathroom or for whatever cause. There are tradeoffs.
My general rule is, for short flights (upto 2 hours) aisle seat, and for long flights, window seats. Other seats are forbidden.
Selecting seats sometimes can be a gamble. If you select the a seat in the middle group of 4 seats (D, E, F, G), and the flight is relatively empty, and your row happens to be empty or only one more person, you can unfold the hand rests and sleep properly using three seats. Else, the window seats are the best for sleeping. Once you get into the cave (the window seat), put down the window shades, and sleep. The only problem is the shades are a bit further away than the walls, so using the shades as the support for the head can be a bit difficult. For that a pillow or your jacket can be used to fill that gap, and it works well. Though with a window one can sometimes enjoy the outside view (sometimes). For long flights, it can be intense sunlight shining on the face, or just white stuff flying around while you sleep.
This time (for my stupidity) I selected a window seat, but without a window. There are a few seats on the window side without the windows, while checking in, I did not notice this fact. When I sat on my seat, and tried to put the window shades up, I discovered that there is no window shade, and then I found that there is no damn window.
Although I was not expecting this, but it had a big positive aspect. As there was no window, then wall is much closer to me, and I can actually rest my head against the wall. With the given pillow it’s even more comfortable. Although I cannot see outside (which I did not want to in this occasion), I could at least get a comfortable place to rest my head and sleep well to avoid the jet-lagged. Also, as the middle seat was empty and the person at the aisle seat was dead, I got to use two seats, which added up leg space.
Actually, I might prefer this seat location in future flights, when I want to sleep well on an aircraft.