Ok so maybe the reason I enjoy it is that it is a remake of this which is the original BBC series upon which the US version is based. The original suffered hugely from poorly defined characters (His wife for example reaction to his decision to sleep with the Reporter character was roughly "Whatever you think is best Dear", The Reporter character is similarly 1 dimensional and by the end is suffering from some kind of Fatherless Woman syndrome and refers to the main character as "Daddy")

So it was awful, but its one redeeming quality was how it broke the fourth wall with the main character speaking directly to the audience which at that time (80's) was a new technique (at least to me). It was a step toward bridging the gap between TV and Novels as mediums for delivering a characters internal dialogue.

So the US version has taken BBC version and expanded every aspect of the original and improved it by rounding out the supporting characters. Its still a one trick pony I guess but its a decent trick which moves it a step above the likes of Orange is the New Black in my book (where the only trick is the ones the inmates sell for an extra dessert pudding).