Lots of good ideas here, as you've noticed, Flyer, there is a lot of personal preference at play with grips.
My choice leans towards soft rubber, but not when the new grips make the area fatter than it is without them (ie- Glock slip on grip additions, I hate them).
For Glocks I like "Grip tape" stick on panels. I think the best thing they ever did was add the finger grooves and thumb shelves to the Glock grips.
I like the Pachmyr Gripper for the 1911, though I have checkered wood on a couple of my guns.
I like pachmyr on revlovers.
Worst grips in the world, IMHO, are the plastic ones on S&W third generation autos.
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-Essayons