I think it's safe to say it's ALWAYS the head injury.
And dude! You made me get a bit weepy when you said that about Grandmama. I miss her so much. Did you know she ate 6 Hershey Kisses every day for the last couple years of her life? It was her "sweet treat."
On my last birthday before she died, she sent me my birthday card as usual. When I opened it, about eleventy billion little white tags that said, "Kisses" fell out all over the place. She'd been saving them for months, apparently.
And you know where I stand on the you being like Grandmama stuff.