Hardcover? Or paperback?
Illustrations? Or just text?
First editions? Or you don’t care?
Signed by the author? Or not?
Lately, of the books I’ve bought, I’ve bought them in paperback—unless I really, really love the author, in which case I’ll buy in hardcover.
Illustrations are OK as long as they add meaning to the text.
First editions are nice, but I don’t own any of those.
I also like signed books, but again, I don’t own many.