I used to engage in maladaptive daydreaming for hours a day. I would sit in a rocking chair or on the couch, listen to music while rocking back and forth and daydreaming made up stories in my head. This was during the lower points of my life when things were not going well - it was an escape from reality.
I am in a much better place now and no longer use it as a maladaptive coping mechanism. There is nothing wrong with daydreaming in itself, but it used to interfere with more important things in my life and that is when there was an issue.