I'm actually one to like Asian cultures specially the Japanese, I've read my fair share of mangas, watched a ton of anime and all that so the transition from Japan to Korea was fairly easy, two more K-dramas and that was it, I was a fan!
Then Psy came with Gangnam Style and the whole thing exploded, at first I actually wasn't a fan of the song alone I found it very repetitive and plain, but after watching the music video and I found that I kept murmuring the melody all day long. I loved the music video specially because of the cameos.
After that a lot of new groups debuted, I became a fan of B.A.P, Beast, Orange Caramel, Teen Top, EXO and more recently GOT7 and WINNER.
What I find very interesting is that I can actually understand like 40% of what they say in a show, I can sing along to my favorite songs, it's a very fresh feeling actually, it kind of reminds me my way into English, being a native Spanish speaker my favorite groups were all English artists, like Radiohead, Oasis, Muse, Linking Park, NIN, so I learned English through music, movies and eventually books, I sometimes catch myself thinking Korean responses, it was very weird at first but after Gangnam Style it's all more accepted, even though my family still thinks I watch "Chinese people".
Looking back, I think this was all a downward spiral, at first is interesting then is fun then is like I can't past a day without watching something in Korean. specially the K-dramas but that's another subject.
So, if you are curious about K-pop just be aware that it's very addictive and a very expensive hobby, they have ton of merch that is actually good, before K-pop the last album I bought was Muse's live album H.A.A.R.P. a very common double CD-DVD case, but these K-pop albums are a piece of art, the first thing you notice is the format, I have not seen a classic CD case in K-pop and that's saying a lot, they know their audience and the love to please the fans, so that's always very welcomed and one of the reasons they still sell a good amount of physical music, compared to the rest of the world.
Photo Source: http://24hrkpop.com/wp-content/uploads/2014/02/kpop-logos.jpg