MX switches in general could be characterized as “linear switches with a little speed bump”; the tactile effect is provided by plastic-on-plastic friction, as the finger pushes one bumpy plastic piece past another one. All the modern MX switches are quite “scratchy”/frictiony feeling, and there is no real steep drop in force past the actuation point, as you get with other kinds of tactile/clicky switches. Vintage linear MX black switches are the best of the bunch, but their springs are too stiff: for me the ideal switch weight for a linear switch is a bit heavier than MX red, basically something very similar to green Alps or white space invaders. But I’m not a terribly huge fan of linear switches. I prefer something with a relatively high actuation point, and a very sharp force drop at the tactile/actuation point. Also appreciated is a switch that gives my finger an extra boost upward on the upstroke like IBM beam spring / Alps plate spring / Marquardt butterfly switches; MX tactile/clicky switches do basically the opposite: they get to the same plastic bump on the upstroke and so the slider sticks just a little bit on the way up.
Clicky switches I like:
IBM Model F capacitive buckling spring switches.
IBM beam spring switches.
Marquardt “butterfly” switches.
Complicated blue Alps (I also like amber Alps, and to a lesser extent white Alps)
SMK clicky switches (“monterey” blue Alps-mount / Cherry MX mount / “inverse cross” mount)
Alps plate spring
Black Hi-Tek “space invaders”
Matias clicky (though the springs are slightly heavier than my preference)
I think I probably type fastest and most accurately on Alps plate spring switches, but they aren’t commonly available in any keyboards with build quality I like, and I don’t particularly like the sound they make; I want to build a better quality Alps plate spring keyboard with a solenoid inside for extra click. My favorite sounding switches are Marquardt butterfly switches, IBM Model F switches, and blue Alps (each of these three sounds quite distinct, but they are each satisfying in their own way). Clicky space invaders have a pretty soothing tick tick tick sound.
Tactile switches I like:
Complicated orange Alps (and to a lesser extent salmon and ivory Alps)
Matias quiet (again, the spring is a bit stiffer than my preference, but the tactile leaf is really nice)
SMK tactile switches (“monterey” white / various inverse cross variants)
Burroughs opto-electric torsion-spring switches (I don’t think I’d want to use these regularly, but they’re quite interesting)
Complicated tactile green Alps (again, not my favorite, but interesting)
I’m not a huge fan of Topre switches, but I understand why some people like them.
I’m not the biggest fan of linear switches in general, but there are some that are quite nice, and they could probably be improved with a loud solenoid click:
Complicated green Alps
White Hi-Tek “space invaders”
Tee-mount Alps
“Vintage” MX black switches with the springs replaced by something less stiff (and optionally with the sliders lubricated).
There are a bunch of other nice linear switches from the 60s and 70s, like hall effect switches, ITW switches, RAFI switches, “vintage” SMK switches, Futaba complicated linear switches, Alps magnetic reed switches, and others, which I don’t have tremendously much experience with.