I always had a soft spot for the first one - but The Battle of the Bulge was my favourite one. The Russian Front was also pretty good, but yes - these games were the first "realistic" WW2 games that I've played, and probably were the first games I played that were moral-based. I think the absolute best things about these games were the incredible sound effects and situational effects that they had; something about the distict sound of a German MG42 that just freaked me out many times when I'd get ambushed.

What a great set of games, I hope they come out with new ones with improved graphics... not that it really needs it.