As an Oriental myself, my tastes lean towards women of my own culture. But only Japan really makes AV. Hong Kong just mostly makes Cat-III films which are actually soft core in nature. Korea is more prudish than you might think and porn is actually illegal there. Likewise with China and Taiwan. So where else but Japan?
Of course, there's underground porn from those countries but I don't really like them. Production values are normally quite poor with amateur camerawork. Not my thing. I tend to prefer POV shoots and I don't really want to see the guy most of the time. This is rare in amateur shoots. Oh, and Chinese porn is full of adverts - on the actors themselves. They're plastered all over the girl in many cases. That's worse than tattoos.
There's some nude Chinese photoshoots that impress me though, but they don't really make gravure or AV like Japan does yet.
I think American porn is gross. No offense meant to any actual Americans here, you guys are cool but I just don't like your porn. Way too many fake tits, and very badly done surgery at that. Plus I think 90%+ of the girls in American porn don't meet my standard for facial beauty. Wait... standard might not be the right word. Preference? I dunno...hard to explain. The makeup is just so gaudy, slutty and overdone in US porn. The Asian porn stars in the US are even worse, IMHO. Almost all of them look like stereotypes of Asian girls which most Asians themselves don't find attractive. Marica Hase was pretty in Japan. Than she went to the US, slapped on that thick coat of paint on her face that American porn stars do, and now I find her unattractive.
Kawaii!
Kowai! Oni wa soto!
Contrast that to Japan where the girls are very often fresh-faced and with light makeup. There are also titles where they wash off the makeup and show their natural faces and they still look great. Small breasts aren't looked down on in Japan like in the US so girls don't necessarily feel the pressure to augment themselves. Those who do get implants, they usually have great plastic surgeons who don't make it too obvious.
Worst you can say about Japanese porn is their butts aren't as big as the West which actually works for me. I'm not Sir Mix-A-Lot. And than there's the mosiac which we need to get used to...strangely enough, that's actually the fault of the West but that's a long story.
I do actually enjoy the European porn scene though. Classier, with more beautiful girls and natural bodies. That's where I go have a look-see if I want uncensored porn. I actually don't like uncensored JAV most of the time. Most of the girls who shoot uncensored just aren't attracitve, IMHO. Its like they can't make it in mainstream JAV so they shoot uncensored for publicity or extra sales. The pretty ones willing to do uncensored have all gone away - like Uehara Ai who shot some as fan service just before she retired, bless her soul.