I love this show. I don't normally watch family dramas because of the length of most shows, but I was bored and decided to give this one a try sometime around December of last year. Three days afterward and I finished every episode that was already shown. Now I'm watching Ojakgyo live despite the fact that I continually lose sleep every weekend over it. It's such a fun and heartwarming show to watch--even if there's a lot of conflicts in every corner, the family's close ties (as well as the comedy and romance) make up for it.
As for my favorite couple, it changes--most of the time it's Tae Hee and Ja Eun, but it can go from that to, say, Grandma and Guksu, who are adorable together. What I like about OB is that the relationships I like aren't restricted to the romantic kind. I think my most favorite scenes are the ones where the brothers get together at a pojangmacha and talk about their dilemmas and help solve each other's problems, or maybe even Ja Eun and Mom's mother-daughter scenes. While I love the romance in every episode, there's a lot more to the story than just that.