PS3 #2 is the Bioshock Inifinte Special Edition theme.
Typically, I'll put on the theme of whatever game I'm currently knee deep in. Around Christmas, I'll put on the fireplace theme to warm the rooms up
On my main PS3:
I use the Tron Dynamic Theme
On the family PS3:
I use the Cute Kittens Theme
On the bedroom PS3:
I use ... not sure, some theme with icons I like, but I use a photo for the background. (often a screenshot from my PC that I pull in via Media Server ... really a cool feature to use, Win 8 makes it too easy now.)