Electrocapacitive switches are what I prefer. They are rubber domes and springs. Even more quiet but somewhat less "tactile" are the boba gum linear switches.

Electrocapacitive switches are what I prefer. They are rubber domes and springs. Even more quiet but somewhat less "tactile" are the boba gum linear switches. They are the quietest mechanical keyswitch I've ever heard and aren't very expensive either.