LOL, no matter how many times this same question is being asked, it always creates enthusiastic responses. The only reason I can come up with, is that it's much more satisfying to bash something than praise it. It improves everybody's articulation. ;)
And I'm no exception. So here are my three:
My Princess - oh, I'm well aware many loved it. But let's be honest here: the only praises I've read were about the male lead's naked torso and the female's dresses. The plot must have been concocted by a group of 6 year-old girls while playing around the Hello Kitty kitchen, the secondary characters were wooden, the music was an atrocity and the editing was even worse (what's worse than atrocious? :P)
Ohitorisama - really, what was the point of this drama? As I said elsewhere, it was just the nth younger guy-older woman trope with an ex Yankumi's student and an older actress 25 cm taller than him. Chemistry: yes, like mixing nutella and lasagna.
Wish to see you again - the kind of drama that takes 100 different directions without reaching any point of interest. Even if you have a navigator, it will keep on telling you "enter the roundabout, enter the roundabout". Even Vic Zhou was confused.