Some might consider some of my comments below to be *SPOILERS* so you are warned.
My Name is Kim Sam Soon - Don't get me wrong, I really enjoyed this drama. I think Hyun Bin is a god on earth and I adore Kim Sun Ah in everything she does. However, I just found this too unbelievable. I'm sorry poor, overweight, older goofy ladies out there, there is no way in heck a guy like Hyun Bin's character in Sam Soon would ever fall madly in love with you. Not happening. I'm sure that part of the popularity is that wish fulfillment, but it was too unbelievable a relationship for me to think it was as great a show as everyone else does. And the open ending was annoying.
Full House - Is Rain beautiful to look at and totally adorable? Yes. BUT this drama annoys the crap out of me. And I even kind of like goofy contract relationship plots and I like hate becomes love relationship plots too. But I had 2 problems with this one: 1) I hate and could never get past the fact that the lead female character let her friends steal from her like that and then stayed friends with them. It made me so mad that I hated her character for the rest of the show. I mean there are lots of weak female characters in Kdramas, but I still find her to be one of the worst pushovers ever. Just sickening. 2) They drag the denial out too long in this one. Sure, dragging out the love denial is totally normal in Kdramas, but in this one they really take it too far. The denial that they loved each other and the nasty treatment towards each other just went too far and too long (and too repetitive) in this drama. There are better examples of this type of plot to be sure.
Moon that Embraces the Sun - I liked this a lot at first, but then realized I mostly liked the child actors, Jung Il Woo, Kim Soo Hyun and the way it looked. It is very pretty and there is some good acting. But when you get down to it, a whole lot of nothing happens. But the worst is Han Ga In. I mean seriously, THE WORST. As in, that was one of the worst acting performances I've ever seen. She was just atrocious and went a long way to ruin this drama for me. (I can't believe I forgot to put this acting performance on my 'worst' list for 2012.)
Boys Over Flowers - Nothing new here. I think this is widely accepted as one of the most overrated Kdramas. It's just a whole lot of pretty with one hot mess of a plot and one of the world's most annoying songs ever on the OST (that paradise song, whatever it is actually called).