My husband and I both eat low-carb. Not exactly "clean", but mostly meat and veggies, eggs & dairy. With an occasional "load" here and there.
My 2 kids are still at home, and for them I just add some healthy carbs on the side of the meat and veggies and some lower-carb treats (i.e. sugar free popsicles & ice cream). With them, I've tried to concentrate more on adequate protein and fiber.
They are both extremely healthy, extremely tall (the 10 year old is almost as tall as I am), very intelligent, with clear skin and healthy looking coats.
The hardest problem I have with them is the 10-year old is resistant to eating animals, I mean RESISTANT, especially chickens. He LOVES chickens and refuses to eat them. I've seen him turn down chocolate cake because of chicken (i.e. you won't get dessert if you don't eat your dinner). We just stopped asking him to, it was pointless. He gets peanut butter.
The other one is a real carnivore and would probably run down and kill with his own bare hands if we didn't provide meat.
As for personality - the carnivore is a real jackass if he doesn't get more protein than carbohydrate - he also tends to run Omega 3 deficient and I keep catching him down by the beach trolling for marine animals to consume. Seriously - he's a fish-a-holic and I have to supplement him regularly with salmon oil. Otherwise he acts up a lot and is very moody. I'm just glad I know enough to do this.
Fawn