Getting back on topic.
I can tell you, as a pureblood Korean who keeps up with Korean entertainment 100%, this k-pop phenomenon has the whole country split.
Current K-pop trend is to pump out many "idols", or boy/girl groups as possible. It all started when SM (the company who owns SNSD) debuted H.O.T, I think around 1995, which had the biggest following in the whole country. other companies found out that this sells, and started just pumping out lots of these groups, where only a few manage to survive, and most just disappear after 1-2 singles/albums are released, simply because they don't sell. That's the gist of the k-pop scene, but it gets much worse...
Obviously, because they had to pump out these groups, the quality of the songs dropped significantly from the "Golden Age" of K-Pop, which was the 90s where artists sold a good million copies of their albums only by words of mouth, the quality of the songs were amazing (Many people still sing songs from this era), flooded with lip synching, mangled lyrics that pretty much have "love" in half of the songs, elementary English that don't even make sense, and people liking singers purely based on their appearance (Shamefully I'm one of those people as well).
1. Obnoxious fans - they're fucking batshit crazy. even worse than the London riots or the L.A. riots in 1994 - they will do ANYTHING to defend their favorite group and only see things from their perspective. These fans will do anything for their favorite groups, and these damage only not the fans but the artists themselves.
2. Elementary English - Some of these groups have foreign members but still pump out songs that have English that isn't grammatically correct. If it was rap I would understand, but they're songs that specifically aimed at foreign countries to sell (because lots of people like k-pop in foreign countries)... as a country that spends a fortune on English lessons, I'm honestly embarrassed by this.
3. No diversity - Other than these k-pop, ballad, and Trot (old Korean songs) there are no other music genres in Korea that can survive on selling albums or digital singles alone. Since there are only like 3% of entertainers who make more than what they can live on in Korea right now (these are really famous people like Rain), the difference between the rich and the poor is on the rise. Also on diversity, there aren't much diversity on races, either... racial discrimination still happens in Korea, and there are really no black or white singers - because they don't sell to the public unless they're like Olivia Hussey pretty - although U.S. diversity cannot be compared because the Korean fan pool is MUCH more smaller than in the U.S., I'd like to see more diversity.
Check out answers.yahoo.com, Korean section - there are a bunch of foreigners who want to be Korean idols, and I can't help but laugh at them because it will never happen even if the world turns over.
edit: Also, the only way for these groups to make themselves known is not by their music but their appearance on TV shows (called VAriety shows that includes all talk shows, contestants playing games and just entertainment TV)
Solid - Match made in heaven (1996)
[youtube]http://www.youtube.com/watch?v=Z-UTG3_29VY[/youtube]
Kim Gunmo - Wrongful meeting (1995) - he sold like 2-3mil. copies of albums back then
[youtube]http://www.youtube.com/watch?v=CDKBuynxXfM&feature=related[/youtube]