My favourite of all the Rubiks' was the snake. Apart from a brief period in about 1990 where I had mastery over the 'rings', it was the only puzzle I could consistently solve without the removal of stickers (look it's a stick... now it's a ball... now it's a stick again... tah dah!).
I've been on the hunt for a good-lookin' set of shelves, and these certainly fit the bill... however function is of equal importance and as I am not looking for a place to display origami, stick like pot plans and vintage cameras, I think sadly the search continues.
Verdict: Shelve It or Hang It?