I liked the characters in FC well enough but I wasn't emotionally involved with them at all, and if I am not it only works for me when there is either OTT comedy or OTT melodrama where I enjoy the absurdity and not the people involved.

I have to say FC has to be the only comedy kdrama I've seen where the gal is 'superior' socially/money-wise to the guy. I've seen plenty of serious ones do that (from A Love to Kill and Snow Queen to the current East of Eden) but it was neat to see in a lighter setting.