I've realised that I feel really out of sorts if I dont have a good book on the go, it makes me feel unsettled, like there is something missing? When I start a new book and I know I'm going to enjoy it, I feel calm. I also get twitchy if I start books and they are mediocre...and it seems to filter through, I can have good runs of reading and enjoying, and then a spell of DNF...quite often I'll go back and read abandoned books later and love them. I have a few authors that i turn to to re-start my love of reading.