Having tried just about every Cherry mx switch (including red, black, brown, clear, blue, and green) along with various Alps, Space Invaders, various linear switches on vintage terminal boards, Topre, IBM membrane buckling spring, IBM capacitive buckling spring, and IBM beam spring, I've determined that the Cherry mx family constitute my least favorite type of switch. I would rank my preferences in switches as follows:
IBM capacitive buckling spring (Model F) ~ Matias Tactile Click ~ Topre 55g > Matias Silent Click ~ Topre 45g > IBM membrane buckling spring (Model M) ~ Monterey blue > Various Alps > NBM Space Invaders > Cherry mx.
This ranking is not etched in stone; my preferences change from time to time.
I've also tried various form factors, including full-size, 65-75%, TKL, 60%, and odd-sized IBM keyboards (F107 and F122). My favorite form factors are TKL and 60%.
After sampling layouts, including ISO, ANSI, Mac, and HHKB, my favorite is HHKB.
With all this in mind, my current favorite keyboards are:
RF 87ub 55g ~ HHKB Pro 2 ~ IBM XT > KBP V60 Matias Click ~ KBP V60 Matias Quiet ~ IBM SSK >> Poker II mx brown ~ WASD V2 87 mx brown
I waited a long time before getting the HHKB Pro 2, thinking I might not like the layout. However, I took to it instantly, and I like the HHKB/Mac layout so much that I now remap all my keyboards to something as close as possible to this configuration.
Of course, you might hate Topre and the HHKB layout, but if you are thinking about it, you will have to try it sometime.