Ditch the Kitsch and Hide Your Opinions
My favorite example of unnecessary and unwelcome kitsch is the pink pig sitting on the fridge door asking if you're eating again. It oinks when your potential buyer opens the refrigerator. This and other comical quips are great fun when you're living in your home, not when you're trying to sell it. Especially avoid politically-charged material that expresses strong opinions. You don't want a potential buyer to dislike you for your beliefs, so remove all questionable material out of sight.