i love it when that happens, at the moment my (non-study) list is zero and thats okay as I am in full study mode and that reading is enjoyable too (just finnished "the New Phrenology" by William Uttal; I'm NOT suggesting you read it ;) but it was really relevant to my cognive psych essay on levels of analysis, as well as enjoyable ).
May be I dont hang around with enough readers, I find it quite distressing to imagine not knowing at all what the best book is to spend my time on next, 'cause I dont want to waste precious reading time, and memory space, on a medium quality book.