The leitmotif is the unraveling of what happened to the FL. Why did she try to adopt a different personality and name to outsiders,? Why did she try to retain her earlier self in front of her friends?
The crux of the matter was the fact that after she reached rock bottom, she met a man by pure chance, and they mutually fell for each other. Thereafter, her friends didn't give up on her, he didn't give up on her, and she realized that she had not given up on herself either.
Around this display of human all too human activities, we find the people with whom she interacts, and their own issues: money issues, love issues, personality issues, drinking issues, image issues, ...
Notice that all this is done without killing, gore, explosions, hostage takeover, politically correct preaching, and other nonsense that plagues so many other productions (HINT: if Hollywood-style stuff is what you are looking for, this show is NOT for you).
Personally I didn't like the product placement (can't stand the stuff they label as pizza in the show), but otherwise it is extremely sweet, with real sweetness and not fake carbohydrates.
Of particular charm were the scenes throughout the series where one could see that people cared for each other.
The police cared for the drunk ML and other hosts at the station. The actress wanted her first kiss from someone she liked and not some famous "pig". Both FL and ML cared about his wedding ring, which he threw in a fit in a canal (him trying to retrieve it after she had gone there and found it, was particularly ironic/good). The restaurant owners at the beach give food and a chance to the FL. When looking for the usually drunk girlfriend, one guy mistakes another drunk for his gf in the street.
Sometimes it is important to stop for one second in life and look at what is positive. This series does that.
Please enjoy it.