The five keyboards on running PCs in my house (the top one is my 'main' PC, used 95% of the time).
Added later (August, 2014) just a note to mention that the Azio #KB505U I got barely half a year ago has now been retired (picture at the top of the image attachment on this post and in the prior post). With my normal use, the keyboard just became unusable... you had to push absolutely straight down in the middle of keycaps, sometimes with considerable pressure, to get a keypress to register. I guess you get what you pay for... it was a cheap keyboard (though pretty) so they must use very cheap keyswitches. I've swapped it with the Dell/OEM seen at the bottom of the collage image in this post.