The materials dictate bottom out feel, as does stem length. Spring weight changes the feel, as does spring progressiveness. Stem design and material also affects how tight the stem is, hence stem wobble, and this has a noticeable affect on typing. Then there's the physical fit of the housing, some being tight, some not, which you can also feel. The housing itself an affect plate fitment which can be extremely important in a hot swap board.

To many people just think about sound, and it's silly, as switches are probably one of the least important parts of the board when it comes to sound, unless we are talking about clicky switches of course.