I've had an experience very similar to this.

When I was just starting with lucid dreaming, most of my (non-lucid) dreams were like watching a film, and my dream body was the camera. One of those dreams even had a narrator and ending credits.

After a while, I had a lucid dream where, for the first time, I was in complete control. I was standing in my living room at night, and I knew that I was dreaming, even without doing a reality check. Still, I tried pushing my finger through my palm, just to confirm that I was dreaming. Even though it worked, I could not believe that it was actually a dream. I was amazed by how vivid everything was. For example, I could feel the floor beneath my feet as I was walking, and I could feel the muscles in my legs with every step I took. Even now, months later, I'm still amazed by how realistic that dream was.

Before I had this dream, I had already made a large list of things I want to do in a lucid dream. But I still spent most of the dream wondering what I should do. I think that it's just hard to decide on something to do if you can do anything you can imagine.