Thank you and this is a very interesting topic. I found myself travel quite frequently but then every time i find my ear holding up quite differently. Sometime it is really painful, sometime it is quite ok. I am not sure if there is anything to do with the plane design or anything.
In fact, the big problem is the line spacing problem, I tried KA A320, very narrow, when someone went to the bathroom are very troublesome, because you want to stand up.