I think it sounds really neat to be able to repair old books. I bet this is a useful skill for librarians who work in research libraries that hold old books.
I personally love books of all kinds, so I totally see the appeal in repairing older volumes. But unfortunately, there's one pesky problem that stops me from getting close to older books: my allergies. I have serious dust allergies! If it wasn't for that I think I might have become a librarian.
So I think I'm just going to have to admire people who take the time to repair old books from afar. Really, just thinking about it is making me feel like I have to sneeze.