Your favourite figure: a poll (or in my case, a Pole)
Good question, well framed and I'll stick to sets I actually have rather than figures I've seen on PSR that look far better but I don't have any period interest in (cough-WSS-cough).
The recent Boer infantry set has loads of great sculpts with so many versatile uses with only a couple of bum notes. A theme of irregulars cautiously advancing and firing. Looking at PSR and the figures themselves it comes down to the 2 figures advancing, head down, on the bottom row and my choice is the middle one cycling his rifle-bolt.