I agree with Ripped to an extent, but I do think there is an individual macro ratio that works best for people. From what I see "ectos" don't fare well on low carb diets - they struggle to consume enough calories and get too thin.
I'm naturally quite lean (smallish build, but reasonably athletic... somewhere between "ecto" and "meso") but I've definitely noticed different weight loss results on different diets. On low fat diets I get skinny. That doesn't happen when I go low carb.
I did a DNA test that looks at teh relationship between diet and your genes, and I was told that I have excellent insulin sensitivity, but that my body stores to mobilise fat stores. That made sense to me, cos' I don't have issues eating carbs, and I while I was low carb I was completly exhausted (beyond the projected "carb flu" period), and I don't think I lost any body fat - just water weight. For me to lose fat I think my fat intake has to be lower.
At the moment I'm eating intuitively and my macros are sitting around 55:30:15 (C:F:P). My energy is good and I'm able to keep pretty active. If I want to drop fat before the summer I'll experiment with getting protein higher and fat lower. If I want to lose bloat I'll drop carbs. Still experimenting!
"I think the basic anti-aging diet is also the best diet for prevention and treatment of diabetes, scleroderma, and the various "connective tissue diseases." This would emphasize high protein, low unsaturated fats, low iron, and high antioxidant consumption, with a moderate or low starch consumption.
In practice, this means that a major part of the diet should be milk, cheese, eggs, shellfish, fruits and coconut oil, with vitamin E and salt as the safest supplements."
- Ray Peat