This could be a long list. But even the crappy books I've read have taught me something. However there was one book that I started that I wish I hadn't even picked up. To be frank I wish it had never been written.
Day #30: An author that you will read whatever they put out
A few authors came to mind. J.K.Rowling..but I haven't read The Casual Vacancy yet so she doesn't count. Ken Follett...but I haven't read his early crime stuff so I guess he doesn't count either? Bah. I don't know if I've read the entire works of any author? (Besides dead folks that won't be putting out any more books!)