My wife and I cook ~95% of our meals. We eat out maybe once/twice per month.
Neither of us are too picky or on any specific diet, but generally we make meals that are high in protein (meat), some carbs, and a generous amount of vegetables.
Typically, we make rather large amounts so each of us has another meal for lunch the following day.
We try to avoid pre-packaged/prepared foods whenever possible. No pasta bag meals or pre-seasoned chicken, etc. Also, we stay away from anything that contains soybean oil, vegetable oil, or soy products. Organic meat, vegetables, and fruits, if possible.
We still eat some bread/gluten, but our overall carb consumption is down considerably. I experimented with cutting out carbs almost completely and substituting with more fat in my diet, but saw a decline in my energy level.
We drink alcohol ~2x per month, maybe splitting a bottle of wine each time.
We started more seriously focusing on our diet a few years ago and definitely noticed changes in our energy level, body appearance, skin, and overall health.
Don't kid yourself, what you put into your body matters.