There are so many guys I've seen in the gym day in and day out that absolutely never change. And I know they're on, and some of them always on and off heavy cycles. The biggest common denominator I notice with all of them is their work ethic. Same thing, day in and day out, year after year. I think so many people get caught up in the "everyday slump" they don't even realize it sometimes. That's why I switch it up and go to different gyms often. Just changing the scenery and training around different people is enough to keep that hunger going. I think so many people just lose that hunger.