"I always grew up with voices of doubt churning over in my head, and was beating myself up. I'm a perfectionist by trade, and they live the life of constant failure because no one can ever live up to a perfectionist," Mr King said.
He started The Nutters Club in 2009, which started with him talking about his own mental health on Radio Live, and is now also a weekly show on Maori Television.
He said The Nutters Club, and charitable trust Key To Life, aimed to turn New Zealanders' attitudes about mental health and suicide around. "When people commit suicide, uncaring New Zealanders say it's a choice, but people don't commit suicide out of choice, they commit suicide because they got no choice, they have nowhere to turn."
He said New Zealand was in the grip of a crisis, and needed to stop looking to central government to fix the issue.
"Central government comes with conditions, we need to be careful. It's too slow, and communities can start action immediately ... If the community gets in there to help we don't need help from those other people ... it's more effective and the community owns it," Mr King said.
Mike King at Masterton Town Hall, Thursday, October 25, 7.30pm, FREE