Hedonism is probably the most difficult religion to reach the height of. You have to be able to say w/ a straight face in any situation: "I was put on this earth to have fun."
I *do* think it's possible. E.g. imagine Arjuna killing his loved ones w/ glee on the battlefield in a dramatic expression of the Will of the Universe. 'full enjoyment of every moment' is easy when there's no understanding of responsibility.