What are your top 5 Korean OSTs from drama series?

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I love to watch Korean drama series even their OSTs (original soundtracks). I'm not a Korean but I tried to sing these songs. I just look for their lyrics and translations so that at least I have an idea of meaning of the song and just memorized it. Now, I try to learn Hangeul and I hope I can speak Hangeul fluently. By the way, these are my top 5: 1. Original soundtracks(OSTs) of Tae Wang Sa Shin Gi (The Legend). 2. OSTs of Full House. 3. OSTs of Princess Hours. 4. OSTs of Hwang Jin Yi. 5. OSTs of Jumong.