I've been a huge fan ever since I read the Kitchen Diaries and one evening he goes to the corner shop and buys two tins of lager, a bag of frozen chips and frozen peas to eat with ketchup in front of the TV and someone accosts him and says "hey! aren't you Nigel Slater?" and then sneers at his frozen peas.
I love every single one of his books. The recipes always work for me and Appetite and Real Fast Food in particular, and the Kitchen Diaries, helped me get into the situation where I can look in the fridge and make dinner with pasta, a couple of dairylea triangles and some wilty cabbage, rather than buying piles of nice ingredients especially. Tender gave me the courage to grow some herbs on my windowsill in a 2nd floor bedsit and now I have a patio, to grow a few more adventurous things.
It's interesting that 99% of the comments here are about his TV show, which I have seen only twice. I assumed everything was wrapped in brown paper and decanted into glass jars because the show was on the BBC and didn't have a supermarket sponsor a la Jamie Oliver and Sainsburys, not just because it's all supposed to be naice and posh.
And the thing about him eating alone is interesting - when I was single I remember watching Nigella and the Barefoot Contessa with these crowds of friends and family and thinking "why bother, there's no one to cook for" and eat Pringles. Whereas in one of his books Nigel says "the best thing about cooking alone is you can buy three perfect scallops or a single nice steak, and eat them by yourself when it would be far too expensive to buy for two". I think that made me a lot more confident and happier on my own making real food and eating it properly.