That sounds like quite a nice experience.
My experience of seeing a face after waking up however is not so nice and it frightened the life out of me ! I just woke up one night in the darkness right in the middle of the early hours and literally the minute I opened my eyes a grizzly, horrible face flashed like a white mist in front of me, it was a toothless man with greasy hair and cloaked. He looked as though he was growling at me with a scrunched up expression, and dog like. It was awful!
I couldn't tell if I had been dreaming though! What you have seen seems rather nice. The element that seems the same is how you describe the level of detail, I can still see that face in my minds eye vividly now even after four years!