Do you stand your consoles up? or put them on their side. I've heard that if you stand consoles up it can scratch the disks. But I've also heard they get better ventilation standing up (good if you have a original xbox360)
Well I was told that 360 standing up covers some vents, so I always kept it laying down when I had it. PS3 I had laying down at first, but now it stands up. PS4 lays down cause it just looks nicer that way lol.
I lay my PS3 to the side and stand up my Wii U. I had my Wii U laying down at first for a day or two, but it just felt wrong not using the stands that come with it.