In one house at which we looked, there were 3 aquariums in one of the bedrooms, & each aquarium contained multiple snakes. The realtor & I were peering into one, when DH looked in over my shoulder & casually said, "Oh, those are rattlesnakes."
The realtor & I knocked each over trying to get away.
At another house, when we walked into one of the bedrooms with our realtor, someone was asleep in the bed & yelled at us to get out. LOL!
Regarding appliances, we've purchased two houses, & the only appliances left at each were the stove and dishwasher. When we sold our house, we took our refrigerator, washer, & dryer, & left the stove & dishwasher.
We looked at over 100 houses (I was being picky), & I don't recall ever looking into any of the refrigerators. I felt too nosy as it was just looking into closets & opening some of kitchen & bathroom cabinets & drawers. I never opened any of the medicine cabinets either.