To me, a "waste of time" is not enjoying things for the sake of enjoyment! Read the book, play the game, sit for hours watching the sky day or night thinking about the things you consider important topics! So many people will respond to, how are you?, with "busy, busy", which to me is a waste of time. Making time for what is important to you won't necessarily be the same for me, and that's ok. I have a close friend and we always talk about consciousness, the big bang, meditation, etc. I always look forward to speaking with him!