I agree with you 100%, I have seen them all and I believe that there all great, they each have it's own beauty. I can't pick which one is my favorite. If you haven't seen any of these give them a try, even though they have quite a few episodes, they're worth it.
Still watching this because of Woo Bin, I believe he's doing a good job holding up this drama. Can't say much about the other actors, well the dog is doing a good job looking all cute, but he better watch out cause that kitten made an appearance, I think there's going to be a rivalry. LOL