I've actually decided that I don't want to get any/much bigger than I am right now. I think it's time to just get way leaner and get some cardio back. Most women like guys that are muscular but not massive. My wife hates when I bulk and likes me in the summer when I'm lean.

However, I do agree that a lot of it is genetic and so much of it is the dedication. It takes years and years to truly build a great physique and many of these guys have simply put the time in consistenly without the time on/time off that most of us do.