I have banged on previously about a term that I have invented - 'BBC gays' which refers to Norton, Carr etc., insofar as they are seen as the 'safe' side of homosexuality. They are cuddly and friendly and slightly cheeky in a music hall sort of way, so old grannies can watch them and grin at how 'naughty' they are.
Obviously there is no point in being a 'BBC gay' unless you populate a programe format that allows you to emphasise it at regular intervals, say about every fifteen seconds or so.
So that is the format of show that these presenters offer, and people like it or not - personally I don't, so I don't watch them.
It's a fair point that Parkinson was a very different style of interviewer, so it's not comparing like with like to say that he was better than Norton and Carr because the format is very different indeed.
We have to accept that as in all things, chat show entertainment has moved on, and the days of Parkie are gone, as are the massive viewing figures that type of show produced. The popular format now is the Americn version, pioneered by Jonathan Ross with The Last Resort, and evolved by him, with the baton picked up by Norton, and Carr etc.
To sumnmarise, I find the constant campness to be tiresome, so I don't wach these shows, but I am increasingly in the minority, which is the way it is.