I don't know if anyone else's answers solved your problem but here's my thoughts on the matter. Being involved with anything for as long a period of time as 10 hours a day for several days in a row is bound to leave you with a burnt out feeling sooner or later. I would say if you are like me and enjoy immersing yourself with the little things like chatting with the NPC's and making sure your character's are equipped and performing to your preferences...things like that; take a break from the game and devote your thoughts and energy to something different for a while. Then come back to the game after a time. I too will sometimes get carried away with daily play-times and for me, this is what cures that stale taste that can sometimes emerge.