Number one. Who dictates what normal is? Number two. How much is too much?? As far as I am concerned, if it feels good and it is not taking away from important aspects of your life than I don't see the harm in it. Important aspects might be your social life, your health, physical and mental. Is this lifestyle causing you issues at work?? Sometimes it's really good for a person to give themselves a break from an area in their life that might be somewhat extreme. For instance, averaging over 12 hours of poker a day. Don't get me wrong, if you are striving to be a professional poker player than playing 12 or more hours of poker a day may not be so extreme. That being said, I am pretty sure that even the top players in the world have to take a physical and mental break ever so often. If they didn't, they probably wouldn't be some of the top players in the world. I guess what I am trying to say is that an individual needs to try to find that balance that works best for them. What works for me may not work for you, but no matter what I believe that it is definitely important to try to find that balance. I hope that this may help you to become a better player in the long run and good luck!!!