Kim Hyun Joong & Jung So Min...

My insights about MinJoong couple!

I, definitely like this couple very much.. they have good on and off chemistry.

As for KHJ, he really seems to be awkward when meeting new people but when he spends more time with them.. he's comfortable and being able to joke around having his 4D personality.
As for JSM, this the first time that I've watched her in a drama and she did great in portraying OHN. I see her as a friendly and lovable girl. She seems to make people feel comfortable when working with her.

Their off-screen chemistry tells us how comfortable they are together. It would be hard if they weren't comfortable since they have most of the scenes plus kissing each other would be awkward.

As for having a relationship in real life, I'll be rational. Since its hard to work in a relationship having a busy life. Mainly, KHJ and JSM have other things to consider.. their work and fans. Work, probably after PK... there would be a lot of offers to be considered like different dramas, CFs and KHJ's singing career too. As well in reality, there are some fans that wouldn't like them being together. It would just create pressure towards them if they would be a couple.. and it wouldn't end up good.

Maybe in the future, if fate meets them up together. Then, time would tell!

just my two cents :)