^Re the Skyfall/psychologist query - I thought you answered your own question there. That's how I interpreted the scene anyway. We later learned that he never returned to the house until he brought M there and he didn't seem in the least bothered when it was demolished to the ground. So I thought it fairly apparent that that name was something of a trigger word for him.
Yeah, I thought it was pretty clear in hindsight why Bond stopped talking at the mention of his boyhood home. Doesn't seem like there's a lot of good memories, and Bond doesn't strike me as a sharer.