Oh, I loved this. Just did my first AD - and I had to give myself a task to make me do it. It took me 30 years to go beyond the Morning Pages.
I don't know why play is so hard. There is this great moment in Orbiting the Giant Hairball where the author talks about going to an elementary school as a guest artist. When he asks the 1st grade, "who is an artist?" everyone enthusiastically raises their hand. When he asks the 6th, only a few raise their hands, and they are tentative.