A bit more art just to let you know we are still alive (I can take a picture of us next to todays newspaper too if you'd like! :D)
This is most of the different pistons.
Clockwise from top: Generic High Compression, 4 Valve High Compression, OHV & Direct Acting Single Cam High Compression, and the next 3 are Low compression versions of same.
Those are just the two extremes of compression however, as you change compression, the piston will morph between those extremes.
Not Pictured: Different finish on forged and cast pistons, Ultra-Lightweight Pistons.