I haven't lucid dreamt since a child, but I recall everything about the dream continuing to be autonomous as before becoming lucid, but if I wanted to do something, I could add that element. I definitely could still be surprised, as the dream fulfilled wishes like a genie would, meeting it technically but perhaps not as I meant when I willed the change. The few times I reigned my subconscious so I had full power and there were no longer any surprises, I would wake up.