1. Faith
2. Healer
3. Fated to Love You (K Version)
the first two because they show a really good version of relationships. Lots of communication, cooperation, hard work, trust, and faith - there's no need for confessions. They're flawed wonderful human beings who you carry with you and think about during your day when you're doing other things
Fated to love you...I was really unsure about it at first, but by the middle where the standard K-Drama crisis happens, I had to pause for a week because I knew I would hurt so much for the characters because I liked them so much; their pain would hurt me. It's got really silly fantasy elements but the two leads are both such great people.
Honourable mention to Age of Youth.