I just picked a window in the rear cabin for my upcoming KE 17/18 flights. I assumed that the back cabin would be less crowded than the front cabin. The middle one being spacious makes sense, but I wanted a window and didn't want a view of the wing. I've heard that the rear cabin, being behind the engines, might be a but noisier, but we'll see. The only thing that I'm worried about at all is the possibility that they'd run out of meal selections before getting to me. Would hate that.