Well, I guess for you "normal people" their is probably a lot of hard things about this health and fitness lifestyle.
For myself on the other hand, the only hard part (apparently) was deciding I was going to flip my whole life around, and go from the absolute extreme of poor health, to the absolute extreme of health and fitness. It's actually really easy when you just completely eliminate stuff like chips, candy, ice-cream, fast food, fried food, etc. For you all that try to eat just a little bit of this stuff, then try to use self control to stop right there.... Ha ! If that works for you, more power to you. For myself, that would be like telling a crack head, "Okay, here's 10 lbs of crack rock...... but you can only take a few hits. Then you have to just stop right there. Oh, I'll be back in a few days to see how your doing...." YEA RIGHT ! Like that's really going to work !
Oh, and as for keeping up with my workouts..... eh.... Sure, I have some tired mornings, or maybe a hard start, after a full day of physical work, but once I get going, and start to get my pump on, I usually feel pretty good.
But hey though, again, if I were only trying to have a medium amount of lean muscle, and like 13% BF (in other words, where I'm at right now) yea, it might be hard to try to simply maintain where I'm at. But since I want to be rediculous buff, and 9% BF, I can't even think about just "maintaining". I have such a long ways to go..... and at 47 years old, I have no time to waste.
Honestly, I have a harder time "not working out" on my scheduled rest days !
Peace,
Fish