Everytime I drop a hellspawn nazi (Mimic) i always find myself wanting to rush over and loot. Really wish i could, but they drop nothing.
Making mimics drop ammo (Different ammo for different mimics, Shotgunners would drop shotgun ammo, etc.)
tumbleweeds could drop artifacts (like the teacup and the lock and such)
And maybe it's a only a 30% chance anything drops at all.