I've been using Calibre for a while now (started about 5 months ago when I needed to load my iphone up with books for a 5 week trip around Eastern Europe). I've finally gotten around to filling in meta data, etc. I love the way Calibre converts almost every format - remember a couple of years ago while living in South Korea I was trying to find my fav books in ebook format and only version was error ridden word files. How times have changed
I read almost anything but my main preference is for trashy romance books:P Most recently read the 1st Game of Thrones (on my iphone, so many pages as you can imagine) and the latest Diana Gabaldon book.
Have a great weekend