in my lycée's informatic room, there is a lot of keyboards; I had classified them in three categories:
-the keyboards "springs" when one press a button, he isn't stopped by the bottom of the keyboard, but he's stopped in medium of race by "somethink" probably a spring... I don't like these keyboards because I miss the keys and I must all time delete my words
-the keyboards "monopolized" they're black, pretty, the keys aren't gone up on springs... and they're the first taken :'(
-the steel keyboards: the keys must be pressed strong to go down, and their increase isn't guarantee, and after use the fingers hurt... I prefer the monopolized keyboards (thumbsup)