Well spotted. The desire to be or to do. For it is important to do rather than not to do but what to do or more importantly what to be and in this notion we must consider Being and our connectedeness with all things.

Seligman and play and meaningfulness and time to reflect. You may be interested in the following recent article in the Humanistic Psychologist.

Medlock, G. (2012). The evolving ethic of authenticity: From humanistic to positive psychology. The Humanistic Psychologist 40. 38-57.

It attempts very well bridging the two schools and was helpful for me in its link to existentialism, especially the work of Sartre. Both Sartre and Gadamer talk about play. On pages 601 to 603 of my copy of Being and Nothingness Sartre describes the notion of play as being a particular type of project, which has freedom for its foundation and its goal, and which deserves a special study, “Ethics”, which he then spent the rest of his life exploring. By freedom it means one is personally responsible for one’s actions amongst other things. To quote Sartre
“Nevertheless the fact remains that the desire to play is fundamentally the desire to be.”
Sartre’s work is immense and challenging however given the circumstances of our current reality Sartre’s phenomneological descriptions and notion of “bad faith” are particularly relevant today and may offer a way forward as their is “No Exit”.