Below lists my favorite dramas of all times.The best of the best--in my opinion, of course. ;D Descending order.

Title: Shining Inheritance (also known as Brilliant Legacy)
Leading Couple: Sun Woo Hwan (Lee Seung Ki) and Go Eun Sung (Han Hyo Joo)
Comments: This is seriously the BEST Korean drama out there. It's not a wonder why this was THE best of 2009. At first I didn't believe it either until I continued watching it. It's truly amazing with all its plot twists and web of lies. While two people experience different effects of one-sided love, the other two experience a difficult but beautiful love story. Not only does this series focus on romance but it also focuses on family and what money can make people do. In only 28 episodes, the background staff managed to produce the most beautiful series yet.

Title: IRIS
Leading Couple: Kim Hyun Joon (Lee Byung Hun) and Choi Seung Hee (Kim Tae Hee)
Comments: If you're into action and suspense, this drama is for you! I was seriously blown away by the first episode. It's just that good. It won many awards and you won't wonder why if you watch it. I love how Americanize it is. It's like a Korean show with American actions if you know what I mean. The fights are realistic and not fake like the normal ones you'd see in K-dramas. All the actors are good-looking and are amazing at what they do.

Title: Zettai Kareshi (also known as Absolute Boyfriend)
Leading Couple: Tenjo Night (Hayami Mokomichi) and Izawa Riiko (Aibu Saki)
Comments: Okay, this is officially the most UNDERRATED series all all times, no joke! I have no idea why this isn't as popular as it's supposed to be. This drama is humorous, entertaining, lovable, and heart-breaking. Centering on the relationship between humans and robots comes a beautiful love story. This drama, consisting of only 11 episodes, is ten times better than its manga counterpart.

Title: Boys Over Flowers (also known as Boys Before Flowers)
Leading Couple: Goo Joon Pyo (Lee Min Ho) and Geum Jan Di (Koo Hye Sun)
Comments: Honestly, I didn't think the Korean version would beat the Japanese version of Hana Yori Dango but I was improven incredibly wrong when I finally decided to check this drama out. The leading actors had such amazing on and off screen chemistry that it's very hard to not love this series.