I've seen this idea bounce around a lot in the yuku forums and hadn't seen it here so i thought I'd share it and ask for your opinions.
if each unit had its own traits which were gained by actions during battle (for example one unit of line infantry would hold better squares when some line infantry units better bayonet charges because you had ordered them to charge many times in battle) do you think it would help in creating more attachment to your men and urge you to keep a unit alive or improving game play in other ways?
here's some idea on what these traits would be like: