Aw, it sounds like so much fun inside you people's heads. I barely even remember my dreams, and when I do, they fit a few boring archetypes.
I haven't had nightmares - atleast that I've remembered - in a long time, but when I did, it was hardly fun. Because they were painful. Not the same kinds of pain sensation you feel in real life, but equally as unbearable, and inflicted by whatever adversaries haunted me in the dreams.
As an example of one of the last and worst I had, one dream ended up with some character hunting me, trying to shoot me with some weird goo that instantly dissolved whatever it hit. In the end, I ended up caught in a dead end, and managed to convince the character to aim for the head so that I would wake up quickly. It did, but the sensation I felt for a short moment was extremely unpleasant, and I kept feeling somewhat uncomfortable for a short while after waking up.