@aidan,
California mexican food is not as varied as Mexican mexican food, but almost. There are specialty cafes from all regions and many parts of regions of Mexico. The stuff in the chain restaurants, well, it's a start if you've never had mexican food, but mostly popular dreck. As an aside, I've been ranting lately about Texas style flour tortillas, gack, versus Sonoran.
Chinese food in California can run from terrible to accomplished, all in storefronts or in grand emporia. So, not to go on about all the different kinds of food in the US (should I start with BBQ?) - we have a complex development of food, even while having a whole bunch of questionable practices.
What I most prize is freedom to say what I think.