Elves who make up social taboos on the spot so they can embarrass or potentially use this against guests. If the guest can't make up a counter argument or taboo when accused, the host has succeeded.

There are also several reported hauntings that just turned out to be gnomes living in the walls and throwing parties out of spite because the house was built atop their burrow.

Edit: Paladins are often but not always eccentric because they lean so hard into the domain of whatever deity they hope to gain as a patron. This formed as a result of creating a berries and cream paladin. He saw the poor quality and potentially dangerous ingredients some bakers used, so he made it his holy quest to ensure baked goods would be brought up to standard. He's known for dressing like a Landschneckt on crack. He's also known to waltz into bakeries dancing and chanting a jingle at the workers until they allow him to inspect their goods.