I am a fan of the Too Fat Lardie rules especially "I Ain't Been Shot Mum!" and "Through the Mud and Blood". I find the rules fun and they have a good deal realism built into the random sequence. The Meeple and Miniatures website did a pod cast featuring the head Lardie himself Richard Clarke. Mr. Clarke delves into his theories behind writing a set of rules and his trip across the pond to the convention Historicon.
http://www.meeplesandminiatures.co.uk/ The episode is number 78. Enjoy.