. I am just like a half pro (action/sport dog shows and quadbike racing).. and basically an hobbyist for decades (trips all over the world) ..
Little by little I have quit all zooms (mainly 70-200 and 70-300 lengh) and went to 135L, then to 85L (zooms were not versatile enough for indoor/night shooting .
What I can say, is that 85L needs a real good training due to high CA in certain circumstance (between F1.2 and F1.6) and an ultra thin DOF which make AF rather tricky, but once you are trained and beacame skilled enough to track a subject'eyes, head, body with an appropriate AF point.
85L is a terribly versatile action/sport lens, it's the only lens which can focus accurately in the dark (indoor/outdoor), at least much better than 135L which is just hunting. (things are maybe easier with 1D series or apsc).
CA can be mostly controlled trough post postprocessing, but the best is too understand what will make CA and try to close a bit when such thing is in the frame.
As every day life, I also use a 24L1.4II ....
I don't use my 50F1.4 (definitely too soft till F2.8 or even F4. Actually, my 135L stays on the shell, not as versatile as 85L, but a very good lens too.. If I had to get only one lens, I would take 50L1.2 ..