The new Astra looks promising...
On the explaination on Americans' car taste, I think it just have to do with sizes.. In the US, everything is big, big is good, bigger is better. Americans want space inside their cars, bigger chairs for bigger people, cup holders for their large McD cokes.. The roads are wide and can accomodate large cars.
In Japan on the other hand, everything is small and cramped, space for nothing beside the absolute minimum. You'll see a lot of Kei cars and very few SUVs, it's not so much about style but more about practicality. A 660 ccm car makes more sense in Tokyo than in rural Texas, imagine having to put up with 4-5000 rpm whine in 5th gear to keep up with 80-90mph traffic on the I-10, or driving on dirt roads with pot holes that'll swallow your car whole. Or, the other way around, parking a V8 Chevy Silverado in your 'driveway' in Tokyo..
If the US rules of importing hadn't been so narrow minded, I'm sure you'd be seeing a lot of Keis among enthusiasts, the same way you're so hard driving an Escalade around in Tokyo, because people always want to stand out from the crowd. It's not just that easy in the US, or very practical for the masses.