Cadet Nog serves as a living communication system aboard the Defiant.
I loved how Nog not being human was always framed as a benefit, not a problem. He is allowed to thrive and become a valued member of the crew based on his abilities and skills, some of which comes natural with Ferengi biology or culture.
bones, smacking bread onto both sides of kirk’s head: what are you?
kirk: a snack
Quark’s and Rom’s quarters, as seen in Prophet motive and Body parts.
Personality wise this is very on point. Quark’s quarters are impersonal and everything is made from gold and leather. Rom’s is messy, has comfortable seating for multiple people because he actually has friends and the wall hangings looks like finds from the thrift store on the dark side of Bajor’s fifth moon.