I eat liver, kidneys and lambs hearts. My mother gave them to us as children and my children also eat liver and bacon and kidney in steak and kidney pie. Liver and bacon is a tasty meal and stuffed braised lambs hearts are too. My husband said he didn't like liver when we married but to be honest he'd never tasted it. After about 3 years he tasted some of mine, liked it and now suggests it for a meal.
I have never tried tripe or lung - I thought that was for dogs