I have often said I went low fat, (by that, I avoided all fats of any type), low GI, and portion controlled, to lose the 5 stones.
Or the Newcastle diet, which again, is low fat, and very low calorie.
I did need to add fat back in, as I needed to up the carbs and protein in fact, to stop losing weight, but don't actually like fat, it's certainly not any added fat, I'm still on skimmed milk, low fat cheese, it's surprising how much hidden fat there is in food.
So my maintenance diet, ie one that stops me losing weight, is probably 33/33/33.
But it was very low fat when I wanted to lose, and it'll still be the first thing I cut normally.
To be honest I don't particularly count as such though, so long as I still portion control, keep the calories in < calories out, I find my weight goes down, and I eat to my meter, and my BG is good as well.
I probably am better at managing carbs now, certainly the weight loss has improved my insulin resistance dramatically, I know what is a good or bad GI food for me, and I know how much to eat.
(This is particularly useful if I need to eat out, I can simply eat an amount of food to keep my going, and so long as I stop, I know my BG is going to be ok. I'll make the best choice I can, of whatever is on offer, but there'll always be something, which is why I like to keep my options open)
I'm also fortunate I don't get the 'carb cravings' others seem to get,ie I don't have a few carbs them feel an uncontrolled urge for more, I simply put the rest of the food down again, but then I have had 18 months of practice to turn my habits around.
I even managed to have the 1 chocolate hob nob last night, and not the entire packet, like I would have done pre diagnosis.