I like 4x15, it gets a ton of blood in the muscle, doesn't beat up tendons and connective tissue, and builds a ton of strength if done correctly. No, 15lbs is not a lot of gains in a year, but 15lbs of lean muscle mass is. I too drop body fat with zero effert, but putting on size is very difficult, even on gear, my body just wants to stay at 250lbs +- 5 or 10, fat or in shape.