Well, for what my two cents are worth, I've always liked the marble trout-fish knives (cold steel is making a clone now). Light and handy, excellent general purpose mini knife. What if the tang was shorted so that the ring went around the ring or middle finger?

Wouldn't have the leverage, but it wouldn't be made to pry. Should still have plenty of control in that format, and with a thin sheath, it would fit in the largish PSK.