After I had my son, I was stuck in the house all day with a small child and nowhere to go. It was just nice to have a human voice other than my own in the house. Eventually I started to buy jewellery now and then, but I've found over the years that there are other things to buy on QVC that tend to be very good quality. It's easy, their customer services are outstanding, and one or two of the presenters (Claudia, Catherine Huntly, Jill Franks) are nice to listen to. I know that it's not everyone's cup of tea, all my friends and family take the utter wee-wee out of me for watching it, but they've all been delighted with any QVC pressies I've bought them (Slanket, Carpet Sweeper, some Christmas ornaments, jewellery).
I think the reason that this part of the forum is most popular must be down to the fact that QVC has such a broad range of products on offer, not just jewellery or DIY or garden stuff.