The good book, absolutely no question! Granted, I don't have to worry about mediocre sex anymore either. I had plenty of that with my ex, and his being 150 pounds overweight (and all the associated issues) were only a small part of it, getting to the point where a pretty cloud in the sky held more inspiration for me than the wildest night with him ever could.
That said, I'd take my current other half over the greatest books, music, food, or dream vacations in the world, he tops 'em all