If you could add one element to Library Thing, what would you add? I think a feature that deciphers between what you've read and what you own would be good. (Is it there? Haven't found it.)
There is a feature that will tell you if LibraryThing thinks you will like a book or not. It's on the book page between LibraryThing Recommendations and Member Reviews for the book. You need to click on the link to see where on the scale you would fall.
Last night I wasted a lot of time (as in... I just couldn't stop myself - lol) updating the gender of my authors in the Common Knowledge section. :)