Conversely, I thought they pulled off the immature I've just had sex/in a relationship euphoria smugness pretty well.

Definitely, Jessica Jones would have been good for maybe 4-5 episodes, it just ended up becoming draggy and silly for me, and the poor acting and dialogue became more apparent as a result.

If you can look past/get involved with the over emotional drama that goes on, then it's not a bad show. I'm not embarrassed to say I have shed tears on more than one occasion! The earlier seasons are definitely better in my opinion though, I'm not sure I would have forgiven the later seasons otherwise.