Spuds, cabbages, purple sprouting broccoli, tomatoes, salad leaves, parsnips all manner of beans, onions - all taste incomparably better when I grow 'em and pick 'em fresh from my organic plot. If you grow everything on a small scale and all mixed together and let the nettles grow round the edges you hardly ever need pesticides. It's years since I used any insecticides or weedkillers. Damn slugs though. The hedgehogs are a bit slow this summer.