Architecture gone wrong
Have you identified something in your own home or someone else's home that was not a great idea, architecturally, and/or left you scratching your head?
One of my pet peeves is a bathroom, where when you step out of the shower you're right next to the toilet. Then you have to be careful in drying off not to let your towel hit the toilet. Gross! Thankfully my bathroom is not set up that way at home.