Macabre of Knobs

Over the holiday break it was pointed out to me that our house had greatly varying styles of door knobs. Truthfully, in buying a foreclosure a year ago we had so much to do that it had never occurred to me to examine the knobs. As they were all replaced I was able to capture just what an insane mish-mash of knobs there are. Of 9 rooms including two closets, there were SEVEN different types of knobs. The photo really speaks for itself. It's pretty hilarious. What the hell was the prior owner thinking? Did they have a knob fetish?