When you tried high carb did you eat a lot of vegetables?
When you tried high protein and fat did you get enough vitamins by eating vegetables or organ meats?
I've found that just getting the macros is enough for a little while but if you don't get the vitamins (easy by just adding a bit of liver a few times a week or some greens everyday) you're gonna feel bad and wanna quit.
Diet is 100% up to you... cause what I eat may make you feel like crap and same for the next guy and the next guy. Check out Paul Chek's book "Eat move and be healthy" or something like that... he should be able to point you in the right diet direction. Or just research what your ancestors (like 2000 years ago) ate and eat a similar type thing, you'll have to modify it for strength though