No one seems to have mentioned Sven Hassel here. Legion of the Damned, Wheels of Terror and so on are all about a tank crew full of interesting characters having "adventures" in the grim darkness of the second world war. His books have been my greatest inspiration for OW in general.
Imagine playing a group of penal legionnaires with a tank all their own, sneaking away from the main force to go rob a bank - in a leman russ.