I found that for me it depends a lot on the tilt of the seats: when I flew Southwest, the seat was ramrod-straight, and I am not able to relax. On Asian carrier

I found that for me it depends a lot on the tilt of the seats: when I flew Southwest, the seat was ramrod-straight, and I am not able to relax. On Asian carriers, seats are more comfortable, and I was even able to fall asleep. It didn't really depend on the seat pitch, so much as the seat angle.