However, a quarter of respondents would have chosen another career if they had their lives again, with the law, sport, acting and medicine topping the list of preferred jobs and only 2% would want their children to follow them into media.
The survey also revealed that 85% rated themselves as "hard working", 38% as hard loving and 25% as hard drinking.
David Davis, the founder of Mediabuddies, said: "The most surprising factor of the study was the candid way the media was prepared to answer questions about their private lives and feelings when normally they would be asking such difficult and sensitive questions of others."
Almost a quarter or 24% confessed to having had an affair with an office colleague, 20% met their partner at work and 29% knew someone know who was having an affair at work.
As many 26% of the respondents working in TV and radio and the press said they were not upset at all by intruding into other people's private lives and were just doing their job, while 23% said they were upset but needed to do the job and 21% said they would be upset and avoided such work.
Only 2% would want their children to follow them into a media career, with 74% saying they would leave it to them to decide.
The survey interviewed 256 people working in advertising, PR and journalism across 31 countries.
Asked if they believed in what they produced, 34% said they believed wholeheartedly in what they produced, 45% said they believed most of what they produced was good and true but some compromises were necessary and 2% said they believed very little.
The most believers were in the US on 94%, compared with 73% in the UK.
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