I enjoyed the BSG finale too. I still miss that series. The only one I can remember 'suddenly' turning into an angel was Starbuck, though we knew something wasn't right with her after we found out she hadn't died.
We knew Head Six and Head Baltar weren't really there for as long as they appeared, and they aren't the actual characters they look like. The whole point of them was that Baltar and Six thought they were imagining the whole thing at first, until they finally realised their role in everything.
I can't work out how clear I'm being, it's 4am here and I'm off to work in a few minutes.
