3-4 hrs per day??? Even being on, that is overtraining. If you are getting good results off of that, you would get even better ones off of 1.5hrs per day. Then only way you could warrent that much time was if you were doing a full body workout out every 3 days, and even then you would be a mess by the end of the workout, and if you had any energy left you wouldn't have put fourth an effort! Not knocking ya bro, I love lots of volume too, but that's overkill.
Monopoly