It goes without saying that your choice of lenses partly depends on your subjects, shooting style, etc. But for those who have gone all-prime, how did you go about selecting your primes? Did you go on raw speed (aperture)? Image quality? Price? Whether it has a red "L" on the barrel? Is the 35/85/135 combo simply popular or is it the definitive one true lens setup for anyone who goes all primes? Other thoughts?

, and image quality at wider apertures.

