There is a fine line between giving a popular celebrity enough airtime to please their many fans, and giving them too much, so the balance shifts and they become tedious.
It's a difficult job to get that balance right, and to know when to ease off the appearances, and stop the rot.
Sometimes broadcasters misread popularity, and force odious twonks onto the viewing and listening public when the public not only have had enough of them - they had had enough of them from Day One because they were never popular to begin with - Patrick Kielty springs to mind as an example.
Others are held up as pinnacles of mainstream entertainment, despite having no discernable appeal to man or beast whatsoever - Michael Barrymore was always right up there, and for those of a certain vintage - Mike And Bernie Winters.
In terms of PS - he seems to skating the line well for now, with no signs of descending into a horrible caricature of himself like Terry Wogan did.
I think Steptehn Mulhern comes across a little too much 'Schofield-lite' - a Barrett Homes version, just a bit too desperate and eager to please.