I wish COD4 would have stayed with classes but still let us customise our own. I like the idea of being a medic in COD3, it's like no one has a specific role in a team on COD4. I realise we still have preset classes, but they don't mean much.
My Grandfather did a tour of India and areas around there during WWII. He died before I reached an age where I could ask him about what he did over there so I don't know if it would make a good game. He was a radio man I think, back when they carried a car's weight in radio equipment just to talk to a guy on the other side of a hill. That's about all I know.
Sorry 360 guys, but I hope COD5 is PS3 only (doubtful). I want to see a war game that completely utilizes the computing power of the console and full capacity of a Blu-Ray disk.