I would have chosen "none of the above" if it had been an option.
Quite often I think about my favorite actor--generally either playing back scenes from his movies, or imagining that I'm talking to him about a movie I'd like him to help me make, or something like that, although never in much detail.
Or sometimes I imagine that I'm in my imaginary garden, which has a creek, a fountain, a bench, a large tree with a treehouse, and a rocky beach with a pelican who dives for fish.
Sometimes I think about space-time travel and that kind of stuff. Often I think about all of these things together. I also tend to think about colors and patterns. Last night I remember that I was thinking about the bits of dust that had settled on my freshly cleaned floor, as if I were really tiny and I could see the shadow cast by each speck of dust.
I don't do any planning or worrying; I have a hard enough time thinking that way when I'm fully awake.