Taxidermy
They say dead plants bring negative energy into your home, so you can be 100% sure that dead animals are an absolute no-no. So the question is: do you really wish to greet your guests with the head of a lifeless deer?
Can you really be 100% sure that those beady eyes won’t be following you? Leaving aside all these superstitions for a moment, I can assure you that other non-superstitious homeowners would think twice before showing off an animal carcass in their own homes, as taxidermy could be seen as a turn-off for many potential home buyers.
On a similar note, you might want to stay away from artwork that shows scenes of destruction, like a shipwreck or even a battle.