Big splashy box art is all fine and good, but the spine of the game case is what gets the most exposure. In today's Speak Up on Kotaku commenter Mindsale ponders spine art perfection.
Y'know what doesn't get enough attention? Spine art.
Most games just use a high-contrast "white text against a black background," which is such a lazy, missed opportunity to display what you will mostly see if you alphabetize or categorize your library. Bioshock, Dark Souls, Dead Space 2, Portal 2 - all dropped the ball. This is your chance to shine, game! I see the spine far more than I see the box art.
Looking at my PS3 library right now, I can tell you that the prettiest spines are without a doubt Demon's Souls, Arkham City, Valkyria Chronicles, God of War III, Ico / Shadow of the Colossus Collection (with its seafoam spine), and prettiest of all is newcomer Uncharted 3. It looks especially nice alphabetically next to Valkyria Chronicles - its pink / purple sky next to Chronicles' baby blue. It's very pleasing.
Which game spines tickle your fancy?