The fact that they are a 'real-couple' in that sense of the word probably allow more fans to hope fervently that the Goguma couple can become real in reality. Shipping a relationship between actors of the same drama is somewhat tenous compared to shipping this couple, who is having couple interactions at the real level! This is what won me over anyway, the sincerity that they face each other with, despite their dates and actions being followed closely by the camera. (One of my initial reservations about watching We Got Married because, seriously, who can grow love when a camera's in your face!)
I must admit that I cried at the last episode because one could tell that they just don't want to leave each other and aww, it was sad how SeoHyun cried, and how she didn't want to leave, and coming out to give YongHwa a last hug. They did so many sweet things for each other and I like how we are seeing their true characters, unlike drama characters which are scripted! (Though my heart's still with dramas of course:P)
Some are telling me to watch the Adam couple, or the Khuntoria (whom I heard is separating too?) one. I'll think about it. After all, I know that I will definitely be biased towards YongSeo right now.