So what's I've found useful on different keycaps is the difference it makes in feel and sound on various boards. It's amazing how much the thickness can affect the sound and the feel. And since you have some sturdy boards already, it will be especially interesting to know if they are an improvemen or are just on par with what you already have.
Dude, you must be more sensitive to those sorts of things than I am. I'm a musician, so you'd think my ear was pretty discerning. But I gotta say, I don't have a MK whose sound I
don't like. They're all differentit's one of the things that makes it so fun to swap them around.
And while I can certainly notice differences in feeling between keys, too (consider, for example, the difference between your typical stock MX keys and Topre's), again, it's just variety to me... There aren't any whose feel I actually dislike.
That said, I realize at least a small percentage of the peeps here (not you, Samir, necessarily) are of the type who won't let foods touch on their plates, must have everything neatly arranged into tidy little rows, and so on. I can understand how important things like key feel and sound might be to them. :?)