I played a Simic Hybrid Fathomless Warlock once. Which wouldn’t be too odd, except this was in a custom setting with no Simic Combine to immediately justify the race choice—here my DM and I worked it out where my PC’s being a Simic Hybrid was a consequence of making the Warlock pact with her patron, so she’s turning into a fish person, Davy Jones style.

Another PC I have is a Human Ancestral Guardian Barbarian, which is only unusual in that he’s got the Noble background, and not in a “thane of a Viking-ish kingdom” kind of way, in a “poncy landed aristocracy straight out of a Jane Austen novel” kind of way. His family line is cursed, so he’s constantly haunted by the ghosts of many generations of upper-class twits.