There are a number of things that I look for in terms of game mechanics, but I think what attracts me the most would be flexibility. I like rules that can allow for odd units, unique situations, the occasional eccentric general. Anything that allows you some variation from what is usual because not all battles are evenly matched. I’m aware that no rulebook can cover every situation and that too much flexibility can be an issue. But still, I like to be able to occasionally deviate from the norm.
Where there is fire, we will carry gasoline