Lilith, your little rant has inspired me to sign up. Well done. Here's why I don't agree, though you raise some good points.
First, in reference, I'm American but have lived in Shanghai, China for the past six years, and I've traveled fairly extensively within Asia. I'm pretty tight with the Korean and Japanese communities here, and have dated ladies from both of these interesting cultures. So I know something about Asian culture, despite not being Asian myself.
I think you're painting in very broad strokes here. You are - I think - comparing America and Japan, not the East and the West. China is as different from Japan and Korea as America is from Germany and Greece. There are commonalities between the three - and all are rooted in ancient China, just like many Western traditions can be traced back to Rome or Greece - but in the modern era there are extreme differences, as well. My experience is as a China expat for quite some time, so with your experience of having lived in Japan will be quite different, I'm sure.
The bottled teas here suck. They are awful. Is the tea better in the shops and restaurants? Sure. But the junk at Lawson's or Family Mart (yes, Japanese convenience stores are all over Shanghai) is over-sugared and gross. Does the tea also suck in America? Quite possibly, I've never tried it. But almost everything served here is so sugar-laden as to make it unconsumable (not a word).
The deification of the cute. This - honestly - is one of the most annoying things about girls in Asia. They remain infants until their mid-30's. 35 year old women with hello kitty dolls hanging from their mobile phones, giggling and laughing like 16 year old American high-schoolers, watching children's (sorry, they are for children) cartoons in their free time? It's infuriating. Apparently Asian guys really like their girls to act like they are still in high school (or middle-school, even) - but almost none of the non-Asians living here can stand it. ESPECIALLY the Western females, who roll their eyes and get unbelievably annoyed by the whole spectacle.
Funny you should mention cartoons. Did you know that Kung Fu Panda caused a massive stir in China? The Chinese were amazed that a Western studio could so eloquently capture Chinese culture and wrap it in such an entertaining package, while their own cartoons are idiotic (EVERY Chinese movie is about the Monkey King or the Journey to the West - they rehash the same storylines over and over again). The West doesn't do adult cartoons? Archer? South Park? Yes, not the same dramatic self-important ones that come out of Japan, but those are uniquely Japanese, not Asian. Grave of the Fireflies, beautiful. You're right, that is not American style.
Western pop music sucks. Eastern pop music sucks more. Seriously. J-pop, canto-pop, K-pop, mando-pop, blech. It's seriously awful. I would rather listen to Keysha or Gaga on endless loops than the crap that is played on the radios in taxis here. Now, there may be good non-popular pop music out there in Asia. I don't know it. But I do know that there is seriously awesome Western music still being made - Arcade Fire, the National, the Stars, etc.
Oh, and someone mentioned reality shows. They are EXTREMELY popular over here as well, at least in China. Thank god no Jersey Shore yet, though.
Why do modern video games suck? Because of consoles. Stop making games for the ADD fast-twitch masses and go back to the PC crowd. (Please God let Skyrim be spared) Civ5 - ruined. Dragon's Age 2 - ruined. Witcher 2 - ruined. Please please please bring back games like Europa Universalis, Morrowind, Ultima frickin Underworld . . . . the death of games coincided with the rise of consoles - most of which probably come from Japan, right?
Anyway, I'm off to stir fry some vegetables, then I'll hop on my bike and pedal over to the Jing'an Worker's Stadium to teach Chinese folks and expats how to play Ultimate Frisbee.
Don't get me wrong, I love Asia and Asian culture, but the parts you are praising (the popular shows, movies, music) I honestly don't think are any better than what we offer Stateside.