Of course you want variety and vegetables but most people are not getting unhealthy purely from living on shitty food. Very few people can get fat living on nothing but cookies and soda -- they'll tire of it. It's the variety and savory food combined with overeating. Maybe I have a unique perspective because of the city and group I associate with, but most fatties i know eat pretty healthy in quality, just way too much.  There's a very strong correlation between BMI and health. Imo, skinny people living on bullshit are healthier than obese living on fresh food. Of course, a balance is ideal