I think a bunch of realistic classes would be nice. like in an apocalypse RPG.
Worker: someone like you and me, goes to work, has dinner, the nukes fall, runs to the gun store. Uses pistols
Hunter: someone who hunted in life, good at it to. Uses shotguns and rifles.
Inmate: a hardened murderer who will work with you, but would kill you for a twinkie. Uses the shiv(normal through electro) and fists.
Raider: hates working with people who don't support the killing, raping, and stealing lifestyle, but you have guns, and in this world, guns are nice. Uses all weapons, but not as good as the specialty classes.
Soldier: was sent in to control the riots, now the barricades are empty and he has an automatic weapon, and that armor helps to. Uses automatic and laser weapons(not the laser sword or laser shiv)
Knights-man: has gone insane and thinks he is a knight of old, good with a sword and shield, luckily, he has armor. Uses swords and shields(no shivs or general melee weapons) can only use metal and chain mail armor.
weapon classes:
laser: laser rifles and pistols. special weapon: laser sniper
shotguns: slow and powerful weapons. special weapon: auto shotgun
rifles: more powerful than that than the shotgun, but slower and in some cases, has to be reloaded after every shot. special weapon: MI garand
pistol: standard, revolver, and high caliber pistols. special weapon: 50 caliber pistol
automatic: assault rifles and sub machine guns. special weapon: mini gun
Shiv: a makeshift knife. special weapon: electro shiv
sword and shield: swords and shield, as the knights once used. special weapon: laser sword
general melee: clubs, knives, and other things that you hit people with. special weapon: titanium bowie knife
I know this is more of a RPG system, but I still think this would be a cool thing to make.