If you want to see a truly miserable guest try to find Patsy Kensit on Richard Osman's House of Games a few months ago, she moaned all week about seeing her agent about this and never made any effort to join in. Osman looked ready to strangle her by Wednesday.
Ann is winning me over as Countdown host, choux, she has really toned down her abrasiveness since her first week.
I've never seen House of Games, zebo, but I think 'misery' is Patsy's default.