Great thread. I find it very interesting and educational to read about all your personal preferences as to prime lenses and the reasons behind.
I currently own the 16, 27 and 35 Fuji primes, the 18-135 zoom and an old Russian MF 58mm lens. I like all my Fuji's; haven't tested the rusky yet. Currently eyeing the 90mm.
This is how I use my lenses nowadays:
Street: 16 & 27
Landscape / outdoor: 16 & 18-135
Indoor: 16 & 35
Travel: 16, 27 & 18-135
Protests and other crowds: 35 & 18-135
This said, if I had to choose only three primes and no zoom, I would choose: 16, 27 & 90. Given my photographic interests, those three lenses would cover most of my needs.