MDD which stands for Maladaptive Daydreaming Disorder
http://imgur.com/iIpi7MB
A lot of people use it to escape from reality. They play a different character either from Movies, Books, and Music (pretending to be a Pop girl in music videos, going on tour, etc ). It's all in their head though. And you can have balance, meaning, you know what's real life and what is fantasy
This girl explains it the BEST:
http://youtu.be/99lGzpBCbPg
It's very RARE but still common. Do you have it?