My grandfather was at the Battle of the Bulge as well, he too got shot there. He had shrapnel in his neck for the rest of his life, it was lodged in a spot so close to the vertebrae & nerves that they feared if they tried to get it out he would be paralyzed. So he went in regularly for checkups on it to make sure it wasn't shifting, if it was they would've attempted but it never shifted.
He too never really talked about his service. I had to do a report on WWII my sophomore year of high school so I tried to interview him. All he did was tell me about the shrapnel (which I already knew) and listed a couple battles, then he handed me some sort of book that was about his regiment (or platoon or whatever they call it in the Army) and his discharge papers. I wish he would have actually told me more but he didn't. I don't know what happened to that book, I gave it back to him, but I have a copy of his discharge papers.
Overall, he wasn't a warm fuzzy grandfather. He didn't have much interest in me or my sister. However, his brother had been taken captive by the Japanese in WWII and actually was tortured by them, he had his fingernails pried off and part of his thumb chopped off. He was the nicest guy and really caring towards people and he would talk about his experiences I guess (I don't remember much unfortunately). My grandfather actually had 4 brothers that all served in WWII, so a total of 5 sons. He and the brother I mentioned were the only ones injured, so all came back alive. Kind of a miracle really. But it is weird to think of how their experiences might have impacted them so much and in different ways.