Last weekend I did a walk with my daughter at the beach, in past I would take my 35 1.4L (now Art) with me to have the subject + environment on the picture.
As the 50L had mixed reviews I bought the 50 Art a while ago to give it a try, also seen that the bokeh would be noticable different between 35 1.4 & 50 1.4.
I took some great shots, about 90% supersharp.
35mm is my favorite walkaround prime but not especially for portraits, 85L is superb but too tight for a walkaround.
The most difficult choice is keep or sell 35 Art (I have to do a wedding but only for once, maybe I sell it back for a 24-70 2.8L I or 24-70 2.8 VC)
On the other hand, the ability to go back to f1.4 is gold offcourse, maybe I just love primes too much