It's been three years that I learned about South Korea, and it's really a good thing to learn the language. Know how to speak, read, and write. Am not sort of addicted about Korea..but I find the language and culture fascinating. Reasons why?
1. For me, Korean Language is the most easiest form of Asian language..I love learning Asian languages..also Spanish and French..but from all the Asian languages I learned..I found out that Korean is the easiest.
You can easily read Hangul (Korean) within an hour..and it's really easy to memorize than Japanese & Mandarin.
2. There are a lot of Koreans going in and out of the country..and you'll always going to bump with them at all times. So, learning the language is also a good thing.
3. They want to learn English with you, free-talking or sometimes they pay you with a tutor fee. Most of them are really kind, funny, and good to be with..you'll learn a lot from them about their culture, and they learn a lot about you too.. But not all Koreans are that..so, always be careful.
4. If you like spicy food, it's a good way to try it in a Korean restaurant with them..mostly, they'll serve vegetables, noodles, rice, some meat, and soju. Oh yes..they love to drink, but always go with them in a group..it would always be fun. They will teach you games and so on.
5. Good thing about Korean girls are they're really good at fashion & make-up..! If you got a really good friend, you're really lucky..^^