I've enjoyed a few Crichton (sp?), Clancy and King books, I'm not particularly ashamed of it though. My guilty pleasure is romance, I enjoy the whole spectrum from Jane Austen (definitely NOT ashamed of that one) to the cheap Harlequin stuff. I must admit that I've bought more of the latter lately, now that I can download them and read them in public without anybody knowing about it.
I remember a humiliating scene a long time ago in the bookshop "Shakespeare and Company" in Paris, a used books shop where I bought a Harlequin (in French) and a few English language books, and the cashier looked at me funny and asked if I was a bilingual secretary. I think she was confused by my choice of literature, or maybe she thought only secretaries read romance, and since I obviously could read English I had to be a bilingual one.