Sincerity is my favorite human trait.
I think it is the foundation of all the best in life including consistency, honesty, sensuality, (trying to think of one that doesn't end in "y") anyway, you get the idea.
I think we have the opportunity to manifest and strengthen all these qualities through our physique development. It always starts out as disciplined drive - goal focused, driving focus. But over the course of time it can become passionate drive - this energy draws you towards your goals and dreams.
This latter approach can be nurtured through being mindful in all things. And you know I'm going to say something here about meditation, so I just did.
Just getting started...