For me it's the lack of quality ingredients at a core level. Go to the grocery store and you'll find wooden peaches, and apricots that bounce like rubber balls. Anyone who has enjoyed the fragrant, succulent, juicy, falling apart in your fingers versions of the "real" thing, will lament the GMO stuff found in supermarkets.

The same applies to veggies that don't have the slight metallic taste of industrial fertilizer, butter that tastes of the grass the cow ate, and meat that has a flavor and texture unlike anything that has grown up on a feed lot.

You can find great food in the US, but it's usually found at the specialty shops or restaurants - who charge a premium. The rest is factory farmed food, processed in giant factories, sold in chain stores and restaurants. Some of it can be tasty, but in a way that will leave you respecting yourself in the morning.