I never really frakked with the arms of my minifigs before I found Brikwars. I would swap heads and legs and torsos, but that was it, never did anything else. After I found Brikwars, I realised that the only sizable force of similar minifigs I had were Clone troopers and Storm troopers, so after much searching, I decided that every unit in my army would have red right arms. Compounding the idea, I started using the left arms to track what kind of unit the minifig was. It works great, and it allowed me to let my minifigs remain different and kickass. No two minifigs in my army are the same, except for the clones and stormies, and I've been breaking my back trying to find more red arms to use. I think I've finally run out :/
"For every battle honour, a thousand heros die alone, unsung and unremembered"
"Glory to the first man to die!"
"When in doubt, empty the magazine!"
--Steel Legion motto