It seems like most people agree that nutrition isn't the only factor involved with health. Sleep, psychological health, exercise, etc. are all important aspects of overall wellbeing and longevity. Food reward is another rising star in this arena.
I've noticed that people have mixed opinions on which factors are most important, so I thought I'd ask everyones' thoughts on the topic.
What do you consider to be the most important factors to health and lifespan?
I'm curious, too, what everyone's experience with this topic is when they read about nutrition on the internet. Personally, all of these external-to-nutrition factors can be very frustrating because they muddy all of the scientific waters. These variables are easy to throw in as confounds -- if what you are looking at doesn't line up with your current beliefs. I consistently see people in the paleosphere using there "lifestyle confound toolbox" to D-E-M-O-L-I-S-H (as one blogger put it) other bloggers' ideas. Moderate/high carb paleo-types seem to use this kind of reasoning to explain low-carb success. Often, low-carbers also use these lifestyle markers to explain populations like the Kitavans.
I'm not sure where I stand on this issue just yet -- but I will say that in my personal experience, psychological health outweighs anything else.