I daydream in an excessive, uncontrollable way. I've done this since I was a very small child. I create elaborate daydream "worlds" in my mind. These "worlds" have changed and grown with me as I've gotten older. Here is a website that calls this Maladaptive Daydreaming:
http://www.daydreamingdisorder.webs.com/
People who have it will also sometimes compare it to an addiction, and say that it is hard to stop. It is definitely like an addiction to me. Anyone else out there have this problem?