Most civil aviation models are Boeing 737 series and Airbus A320 series, with single channel and 3 seats on each side (3-3 seat layout). The rest are single-channel 2-3(ARJ2 1), dual-channel 2-3-2(767), 2-4-2(A330) and other seating layouts.
1) Window seat: The advantage is a good view, which is suitable for people who like to enjoy the "scenery" in the air (mainly clouds and starry sky) and those who like to sleep on the road. The disadvantage is that it is not so convenient to go out to the toilet, and it is not so fast to escape in an emergency.
2) Aisle seat: The advantage is that it is easy to move, and you don't have to disturb others when you go to the toilet. There is more space on one side. You can escape quickly in an emergency, but it is not convenient to see the scenery outside the window and enjoy the starry sky at night. People who often fly should tend to choose the aisle.
3) Middle seat: neither aisle nor window, there are people on both sides, which is neither convenient nor safe. Not recommended.
4) Front seat: getting on and off the plane is faster, making less noise (away from the engine), evacuating quickly in an emergency, and often eating faster.
5) Middle seat: In theory, being close to the center of gravity and lift of the plane will make you feel more stable. Near the emergency exit above the center wing for emergency evacuation.
6) Rear seat: It is often easier to survive when an airplane crashes (see attached figure for details), but the noise at the rear of the engine will be higher than that in the front seat.
7) Emergency exit seat: The advantage is that it is far away from the front row and has large leg space, which is suitable for people with long legs and relatively safe. The disadvantage is that there is no small table in front. It is worth noting that when the emergency exit needs to be opened, it is usually opened by passengers sitting in this row near the exit, so the check-in staff will generally arrange adults without physical obstacles to sit here. Sometimes the mobile phone check-in can't choose this row of seats and needs to be confirmed on the spot.