Readers of a particular age -- by which we mean at least 30 -- will remember the days of the mechanical computer keyboard, when depressing the keys made a satisfying "clack" sound. Those sounds are gone because the old mechanical switches have largely been replaced by simple rubber domes that contact the circuit board under the keys.
We wrote about mechanical keyboards last year, but avoided the big question; namely, what kind of keys you want with your keyboard. A German company called Cherry makes, more or less, every switch in modern mechanical keyboards, and they come in several different styles (Blue? Red? Brown? Green?!), each of which has its own pros and cons.