I shoot people as a hobby and end up with the 70.200 mkII, the 85 1.2 mkII and the 135...(on FF)
The 135 is the lens I use less, its super sharp and contrasty, the colours are sweet...but it is too long for my style, unless you shoot closely cropped faces. But I struggle to find reasons to take it out of the bag each time...
70/200 is the best lens for people out of control, plus when its raining or the environment is too dusty.
85mm is my true love...I also shoot mostly with 180mm on my RZ67, so I guess I just love this field of view. But this is, one of the sweetest lenses ever made, but we took 3 months to get along...and a focusing screen change.
About technical qualities, they are all similar to my eyes, all excellent glass, except the 85 is just a pain to use, but its worth it.
It is all a matter of what is your shooting style. If you are trigger happy shooting in all directions and like to have a stop-motion sequence of each moment, 70/200 is best. If you are slow and take your time at each capture, then a fixed focal length will play to your strengths.