I thought the Canon 135L had a really beautiful look to it, about the best lens in their line up, for shooting people anyway. The colour and contrast was bang on for my money. I got the 90mm and was thinking, in the back of my head, it would be the same. It wasn't. Still a good lens but I view it more from a technical point rather then an emotive one, as I did with the 135L. Good point about adapting a fast 85 or maybe I need to put a focal reducer on a 135L... I was longing to keep my Sigma 50 Art and did use it for a while for portraits but once I bought the 56/1.2 it make a big heavy lens redundant to my needs.
Funny thing, since moving to Fuji I'm shooting less and less at wide open apertures. Particularly in portraits, but it is nice to have that option if needed.
Ivan make some very valid points in his blog pacing the 5D3 with 24-70 Mk-ii against the X-Pro2 and the 16-55/2.8, the real world speaks a different language than the paperwork & it shows here especially when you consider it was written about a year and a half ago just as the X-Pro2 was launched. The 16-55 has a lot to do with fast AF.
Hands up who has even had a card fail and couldn't recover the images later on their computer?