That's a lot of interesting combo's for the switches. Overall, I'd say there isn't much of a difference between clear and black springs in the different switches. Linear switches don't appear to take on any difference with heavier/lighter springs except the feel. A red switch with a black or clear spring feels almost exactly like a black switch. I'm not sure anyone would go through the trouble modifying such a switch like that.
Red - light, smooth, and sounds good when bottoming out for some reason.
Black - medium-heavy linear
Red w/ Clear - feels like a black, maybe slightly heavier
Ghetto Reds - feel like regular red
Red w/ Black - same as black
Black w/ Clear - feels like a regular black
Dark Grey - these are very heavy
Brown - light with small tactile bump
Brown w/ Black - heavier brown, but you can barely feel the tactile bump
Brown w/ Clear - heavier brown, feels like brown w/ black
Ergo Clear - I can see why people love ergo clears. Much more pronounced tactile bump but still light. Very good switch!
Clear w/ Black - feel about the same as regular clears
Clear - medium-heavy tactile, but the heavier spring ruins it buy masking the tactile bump too much
Grey - heavy, tactile but the bump is almost unnoticeable
Blue - light, tactile, high-pitch click
Blue w/ Black - heavier feel, tactile bump is still noticeable. Not quite a green though. Click is still high-pitch
Blue w/ Clear - feel like blue w/ black
Green - medium-heavy with nice tactile bump. Click is slightly lower pitch than blues.
White w/ Light - feels like an ergo clear with soft low-pitch click and tactile bump
White - medium-heavy with soft click and tactile bump
White w/ Black - similar to regular white although click seems louder
White w/ Clear - feels and sounds like white w/ black spring
Toggle w/ Light - this is cool!
Toggle - love toggle switches
I definitely like ergo clears. That is a much better switch than browns in my opinion. Cherry should make that a factory produced switch.
Toggle switches! Reminds me of the old Caps Lock on typewriters that would click down when in use and then click up when you were finished. I might get my next board's Caps Lock, Scroll Lock, and Num Lock modded with these. I love that.
On you post above, I agree on simplifying the board. I doubt many modders will attempt to switch out a black switch spring for a clear one or a red switch with a black spring. Too minor of a difference to me. It's a lot easier to gauge the feel of switches if I can at least put my first three fingers on the switches (all identical) and press them at random. It helps give the feel of what it would be like to type on those switches. A single switch by itself doesn't really allow you to get the "feel" of typing with them.