When I’m looking at a switch to buy I first would consider the type, then the weighting, then the actuation distance (gotta have that full 4mm, LOL!). The final two parts of the puzzle would who manufactured the switch & the pricing, but those would be my last two concerns.
Edit: I see a lot of people saying smoothness & sound. While I do agree that those are both very important things I did not mention them for these reasons. Smoothness is something you can’t really know for sure about till you try a switch yourself. You can ask other people’s opinions, but that doesn’t mean they’ll align with yours & everybody has differing tolerances for smoothness. What I find unacceptable could be just fine for someone else. Then sound is hugely influenced by the build you put the switches into. Yes each switch will have it’s own unique acoustics, but they will change depending on plate or no plate, plate material if one, mounting type, case type/material, etc. So I was looking at the question as if it was a switch I’ve never tried myself before.