I'm quite happy with the 14, 35 f/1.4, 56 and the 18-55 zoom. When I travel I carry the 18-55 with whichever prime makes more sense for what I plan to shoot; usually, that's the 35. As much as I like the 56, I really only pull it out for portraits; just seems big and heavy on the X-T1. Have never tried the "perfect" 90 but as nice as it is, I think I wouldn't use that focal length much. I use my DSLR for the long stuff; like others, I find that balances (and performs) better.
Like others have mentioned, for whatever reason, I just like the rather imperfect 35 f/1.4 and the way it renders (and feels)...