Behind the walls [diy]

The Great Bathroom Project continues and lo, I have pulled off the main wallboards with a Hulk smash!  The good news for the project is that there is definitely room for a pumped waste behind the boards.  The interesting news is that there's about a foot of space behind one wall and almost a foot and a half behind another.  Plenty of room to hide a body.

So are recessed cupboards and backlit alcove goodies and embedded ant farms the absolute bomb, or are they hopeless feature creep?