While far from my favorite stage, I did like the Living Room stage. It was new to me as it was only in the 3DS version of Smash 4. I only had the game on WiiU.
It’s based on the Nintendogs games which had a sequel with cat friends as well. They’re mainly just in the background.
What makes the stage more unique than a flat surface is the common household items that will fall. I like the randomness of it.
One of the better ones from the 3DS era.