The phrase "little quirks" refers to small, unique or peculiar behaviors or characteristics that make someone or something different from others. Full definition
Every person has their own little quirks, the point is to find a person who knows how to handle that. (bridge4love.com)
Little quirks like having to launch every can of soup into space make the game that much harder to digest. (darkstation.com)
Additionally, there will be times, where your daughter will need to accept little quirks about her friends that bug her and let them slide. (verywellfamily.com)