I adore Nigella and Hugh F-W. I watch everything they do and for some reason, I find I can watch the repeats over and over. Their books are eminently readable too. I think it's because they're not 'chefs' per se, so their personalities, recipes and cooking environments are more relatable.
Their isn't anyone else I make a point of watching really. The first TV chef I followed was Gordon Ramsay, right from Boiling Point up to about the second series of Kitchen Nightmare, when it suddenly occured to me that his TV persona is all an act. I couldn't see him in the same way after that and the appeal instantly faded. Similar story with Tom Kerridge. I got into him because, like Hugh and Nigella, he's less stuffy and pretentious, more blokey, but after reading how he nastily trolled someone who gave the restaurant of a friend of his a less than glowing review, I went right off him.