I kinda prefer a slightly more realistic approach, when it comes to units and weapons at any rate. Most weapons and units in my armies are fairly balanced. There's nothing much realistic about the battles themselves though, I like to leave tools such as pickaxes and shovels around the battlefield, so minifigs can use them as hand weapons. We also frequently fudge things for characters that we like, allowing a commando to dodge bullets, or giving the last survivor of a squad a stupendous feat or extra health.
I do have a keen interest in military tactics and orginization though. I've actually written out the tactical doctrine for the various branches of the Morfaire Armed forces, based on brikwars experience. I sometimes play mini solo battles against myself to test how effective a tactic is. These minibattles also serves as an excuse to throw a few dozen poorly armed troops against well fortified machinegun nests, thus producing mass carnage.