I don't know if this would count, but it's definitely something 95% of people wouldn't even guess, much less the 99% that wouldn't know. All in all, I only think my three parents and (possibly) my sister know.
I fantasize about myself and my social environment. A lot. Let me give you an example.
I was at lunch today, and I finally got the guts to ask my friend Denzel about coming and playing with me. See, I'm an aspiring vocalist and he told me he has some decent knowledge of how to play the keyboard, and I asked him if we wanted to start a band together. He's supposed to be coming over tomorrow night to see if we click musically. While I was walking home, I was listening to Angry Chair by Alice in Chains and thinking of Layne Staley and his stunning vocal talent. I thought, "What if I could sing like that?" And so, I envisioned myself on the mic with Denzel on a keyboard, and a shadowy guitarist, bassist, and drummer, playing at the annual school talent show (which had recently taken place). I also envisioned myself as drummer, and then as dual drummer/vocalist, which brought about the unpleasant image of Phil Collins. As I went back, I thought of how stunning we could be together, how we'd wow the audience, being unforseen and heretofore unheard of, since my father (a 29-year guitarist and 21-year pianist) had told me this past talent talent show had zero bands. I thought, "What an application! We'd fit that notch like a washer on a bolt!" I made a vivid image of each of us in that setting, on the school auditorium stage, playing exactly what I was hearing in real time – and it felt great. Alas, my brain began to rationalize my wild and outgoing thoughts, and the other side came back again. I thought, "Well, we may not be the greatest, but if we work at it, we will be!" And I went home, and it ended there… for a little while. ;)
There's definitely that same effect that goes on here at PC, but I'd rather not share some of those thoughts for the sake of argument.
