I used to think lean meats were better for you. I was fully indoctrinated in the 'fat makes you fat, red meat is bad for you'. Funny thing tho'... I ate low fat, low calorie food that never satisfied me. I ate whole grains and avoided red meat and picked the tasty (but fatty!) skin off my chicken. I ballooned in weight and felt like poop.
I lost about 80lbs by eating big, fatty porterhouses every day and cutting out the grains and sugars. It was a complete reversal of my previous way of eating (and thinking).
Go figure.