I avoid the hardcovers except for those of very few authors because, they're physically awkward and heavier, however, I have reread every hardcover novel I've purchased at least once. In fact I've reread almost every novel I own at least once and within the next 20 years I suspect I will have reread my current shelves at least 3 times on average. For me it's equivalent to rewatching a movie, which people do all the time.

If you never reread books the kindle makes much more sense, but I do, and I lend them out a lot too.