For me I am quite the opposite, I use more of the telephoto side of lens, both on full frame and crop factor cameras, hehe... 85mm is one of my favourite portrait lens together with the 50mm, both are most widely used by me. In contrast I have difficulty using the 35mm focal length for portraits...
Ever since my wide angle has been sold, my 50mm is the main lens now so it's like a 'universal' lens.
Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.
For me, I use the 50mm lens quite often because of its low light capabilities, ability to select a wide range of depth of field, ability to freeze action in low light without flash, great optics and natural perspective as the human eye.
I just did a casual shoot on a rainy day and I didnt have flash, so guess which lens I used indoors? Hehe! The 50mm of course because its a great lens for location portraits.
Window lighting + Shallow DOF is a gd formula for portraits