The general recommendation is for the centerline of the TV to be roughly level with your eyes from your viewing position. Unfortunately, wall mounting places the TV much higher than the optimal viewing height and to me is very uncomfortable to watch, even from farther away in the room.
If you *have* to wall mount it, cut out a large piece of cardboard the same size as your screen, tape it to the wall at various heights and stare at it for a long time and find a height that you like.