How do you define healthy?

This semester, one of the contexts for what I am teaching is all about health. Doing enough exercise, sleeping enough and eating healthy are focal points. While teaching the foreign language vocabulary, I emphasize how important it is to drink water (not Monster, Red Bull, etc.) and eat fruits and veggies. I believe in practicing what I preach so I thought about my own way of eating. How do you define eating healthy? For some people, this means strict vegan; others equate it with ordering salad with their KFC or Big Mac. I get that we all need to eat more fruits and vegetables--- I like these so I don't consider it too demanding. However, how do you eat healthy when you go to a restaurant? Do you ask for sauce on the side and grill waiters about preparation? I don't think I have it in me to obsess quite that much about it so I am trying to figure out a happy medium. I thought I would try out a new vegetable on Monday---kale. I was super excited that I found a very yummy sounding recipe for kale chips! Only added a tiny bit of olive oil and sea salt and thought they tasted okay and very chip like. However, my husband looked at it as if it were a steaming pile of shit. He is not a jerk at all and not a picky eater but was very worried about the crispiness and darkness around edges saying it was possibly carcinogenic. I had the biggest wtf moment as I was really trying to incorporate a new vegetable. But I totally get what he was saying and, since he is a science person, I do trust his judgment. So, what do you think? How do you define healthy eating? How often do you splurge/cheat/treat/indulge?