There is so much evidence for the correlation between diet and anxiety/depression/mental illness. I think it's great that you have experienced these benefits first hand and they are helping you!
I eat a very carb-heavy diet. I pretty much live on bread. I have a hard time with food - I love to eat but there aren't a lot of foods I'll actually eat, if that makes any sense. The only meat I eat is chicken breast. I don't like sauces or spices. I like my food quite bland. I was recently at an all-inclusive in Mexico for a week and EVERY DAY i ordered chicken and rice for dinner!!
I struggle with anxiety and depression and have no doubt that if I could just change my diet it would make a huge difference. Food is a total mind-*****...there's no question...I'm really glad to see your post because it is a bit of a motivator for me to try to reduce my carbs just a bit and see if i can notice a difference.