One trait that the actor felt Doug need to lose was his "cowardly" persona.
The actor, who plays Ste Hay in the Channel 4 soap, said most of his family and friends already knew he was gay but it was the first time he had said it publicly.
'When I was on Dancing On Ice, newspapers speculated and tried to say we kind of know and if you want to say so, you can do your story with us and get it out there,' he said.
Doug was created as one of three new fresher students - alongside Jamil Fadel (Sikander Malik) and Leanne Holiday (Jessica Forrest), he was introduced through the series' online spin-off Hollyoaks: Freshers. Brennan was asked to return in the month following Doug's on-screen debut.
He had hoped for a return, but was also content with his character's initial story arc because it featured "a beginning, a middle and an end".
'All the viewers know that Ste is now exploring his sexuality and turning gay.' Richardson, who said he was teased about his sexuality at school but not bullied, said he spoke out publicly to help other young people.
'There were one or two people, if somebody is gay they can maybe sense it and they might have said one or two comments. 'Now I feel I'm a lot stronger, I'm older and nothing can hurt me any more. 'We don't live in the Dark Ages any more, we live in the 21st century and everyone should be happy and love themselves.' The actor had girlfriends in the past and said: 'It wasn't to say that I didn't fancy them.
Hollyoaks actor Kieron Richardson came out as gay publicly for the first time today.
Richardson, who came third in this year's Dancing On Ice, announced his sexuality live on This Morning as he revealed a new soap storyline will see his character start a homosexual relationship.
Any bad judgments are not as intentional as they once were.
The audience were also able to better relate to Doug's mistakes.
He appeared in 5 episodes before returning on 13 January 2011 as a regular character. His storylines have included drug dealing, a relationship with Jenny (Daisy Turner) which ended in her murder at the hands of a serial killer, an attempted suicide, and entering a civil partnership with Ste Hay (Kieron Richardson).