With me once I immerse myself in something for a while I'll dream about it. I was a Psych major and I did a project on newcomers to chat rooms for my senior paper. For weeks I'd dream that the only way I could talk to people was by pressing their refresh buttons. I'd get all hysterical in the dreams, yelling, "Where's your refresh?"
The footie dream I have most often is about occupying Maldini's body...that one often gets weird though.