I actually used to use this feature all the time, probably the most of all the features. I'd click people's profiles and see what we had in common and then look at books in their libraries that I wasn't familiar with. I don't know why but I don't do that nearly as much anymore. I don't think the "recent" one was there when I used to look at it all the time, that doesn't ring a bell. Is that new?
What's your favorite librarything feature?