Arrow: Oliver Queen's Trauma Recovery

In the CW's Arrow, before Oliver Queen got stuck on Trauma Island, he was a stereotypical Billionaire Playboy. When he got back, he spent a lot of time pretending he was still the same person, in order to cover up who he had really become: a vigilante on a quest for justice. Oliver pretended his five years of trauma hadn't dramatically changed him.
This was part of Oliver's strategy for recovering from his trauma. While he worked on becoming a healthier (less angry and murderous) person with the help of his trusted friends, he pretended he had already recovered.
An article on this topic could analyze the progress Oliver makes on his trauma recovery over the course of the show.