It's delicious and cheap. Part of why most people fail at being vegetarian or being vegan is they think they have to be nazis. And that's part of why people hate eating with vegetarians/vegans. It seems like you would throw a fit with your friends if they all wanted to get fast food.
You'd be surprised.
I'll generally go anywhere, but there's some places I won't go because they have nothing on the menu. Sometimes, though, I'll just eat first and come hang out, or smuggle in granola bars (which aren't great for you either), or something like that.
One nice thing about being grown up, though, is that fast food generally means picking it up on the way somewhere. So a lot of times when people come over, they'll pick up fast food and eat at my place (or wherever we're going). Or I'll pick up something and eat it at my friend's place. Unless it's a special occasion, we don't normally go for random food.
My attitude is that I never get enough...
Protein, especially from animals, is linked to all kinds of diseases (from brain stuff to heart disease to a bunch of types of cancer). In small amounts, it's required and beneficial, but in the amount eaten by the average American/Canadian, it's dangerously unhealthy.
I'm sure I've posted that before.