I never buy bananas, avocado, mangos, garlic, oranges or onions organic. Stuff like lettuce/spinach leaves, red/green pepper, carrots and apples etc yes I do buy organic. Anything you peel and eat, there's no point buying them organic. The prices are too g-d high.
Especially foods that contain compounds which are health-beneficial (as opposed to being merely nutritional), like garlic and onions, I make a point in buying organic