To date, I have filled my bookshelf with physical books. I'm looking to add a few to my library and am considering Kindle for the first time. On the pro side of Kindle, after the initial investment in the device, the price of the "book" is cheaper in Kindle format. On the con side, it won't fill the holes in my bookshelf.

Would like to hear your comments on each format and what you do, in additional to responding to the poll.