I've tried vegan, vegetarian, and pescatarian. I have high cholesterol (genetic), so no dietary changes help significantly. Six months as a vegan only lowered the numbers by 10%. Too much work for that!
I have fructose malabsorption which means limited beans and legumes, among other things; and I am severely allergic to soy, so my protein choices are limited. I eat eggs, limited local cheeses, yogurt, hormone and antibiotic-free poultry and locally caught fresh fish along with lots of low-fructose fruits, veggies and whole grains.
I'm healthiest with limited wheat, sugar, no red meat or pork-- basically a Mediterranean diet. And it feels good to help protect our home in any way possible. It used to make me crazy that JWs I knew were willfully ignorant about protecting the environment, because Big J would take care of it in Paradise. Grrr!