I think for me I Hear Your Voice was my favorite. Actually I haven't finished You Who Came From the Stars yet. I'm like two episodes away. For me its not so addicting and I just haven't felt the need to watch those episodes yet. I'm not saying it's a bad drama, but for me it just doesn't have that need-to-watch pull.
Although I love dramas, more and more as of late I'm very skeptical. I'm all about how realistic the actions and emotions of the characters are. So when I find myself constantly being like "Who the heck would do that?" "That doesn't make sense" "Why are they acting like this??" I get really, really frustrated. I don't like when writers make characters do certain things to add to the impact of the story, rather than what the character would actually do.
That being said, I experienced a lot of those "Wtf, why?" moments in YWCFTS. Although, there are many hilarious and enjoyable parts.
I really like the message in IHYV, and I feel like the character development and character personalities were consistent and enjoyable. No huge personality changes suddenly, and the motives were all understandable and believable.
There was a lot of hype for Masters Sun before I watched it because so many people I knew were watching it, so that might be part of the reason I have a sort of 'non-excitable' opinion about that drama. I remember really loving it in the beginning. And I think there was TONS AND TONS of potential. However, I think the character growth particularly for the main female actress was way too forced and not at all gradual.I love the original chemistry and both the actors, but I feel like a lot of the problem was with the with the writers. I think the direction of the story was poorly planned. And the mood of the drama changed so quickly. It was more episode-by-episode story based with a very creepy mood (which I loved) in the beginning, and then It just sort of all of a sudden changed to a focus on only the main characters as if somehow all these crazy incidents that seemed so prevelant before just stopped happening to her. And she'd been dealing with ghosts for her whole life, and in the short time that she knew So Ji Sub her attitude towards the ghost seemed to drastically change. Also, the ending felt very forced. I do like this drama, but I think It could've been a million times better. So much potential. Seriously.