Basic Trope: A character with a very definite and noticable quirk, but who is so incredibly competent in an area of expertise that no one seems to notice it (at least not after first meeting).
Straight: Bob wears a pair of bunny ears on his head, but he's an expert lawyer.
Exaggerated: Bob wears a bunny costume all the freaking time, and insists on being called "Fluffy McMuffins" (possibly to the point of getting his name legally changed), and yet, he has a 100% success rate in the courtroom. He also manages to avoid any case that the subject is faking or exaggerating, showing him an excellent judge of character.
Downplayed: Bob absolutely lovescarrots, and revels in the inevitable nickname "Bugs". Everyone thinks he's a bit eccentric, but he's good at his job.
Bob has a state-dependent memory, and cannot remember his law school education without wearing bunny ears.
Bob is of the opinion that his uniquely gifted lateral thinking and problem-solving skills are somehow related to the unusual way his mind works, but he hasn't found a therapist who's sufficiently outwardly-bizarre-but-expert-in-his-field for him to trust their opinion.
Bob's quirks are to throw people off, deciding that he always had fun at Easter he wears bunny ears happily everywhere.
Bob isn't quirky at all! He's just more expressive than other people. It's just the amount he lets out makes him seem odd, such as wearing bunny ears during work because they remind him of his childhood and why he wanted to be a lawyer, which most people dub odd but he has reasonable rational for wearing them and lacks inhibition.
Bob is hard of hearing, and his hearing aid looks like bunny ears.
Inverted: Bob is terrible at his job, but he's so entertainingly quirky that they keep him around anyway.
Subverted: Bob's client Alice believes that he's a competent lawyer...right up until he calls the March Hare as his first witness.
Double Subverted: ...but it turns out there really is a person named March Hare who is a material witness in the case. Looks like Bob did his homework after all.
Parodied: In this universe, lawyers are not taken seriously unless they wear bunny ears.
Zig Zagged: Bob wins the big case, only for his client to reveal he never expected Bob to win, and only hired him in the hopes that the bunny ears would ensure he'd win an ineffective counsel appeal after a guilty verdict.
Averted: Bob is a competent lawyer, and does not wear any sort of costume or have any abnormal quirks.
"Here, put these bunny ears on. Then it will look like you know what you're doing."
Bob was a perfectly good lawyer, but it's a competitive field trying to get clients, so he took a cue from TV and assumed an eye-catching personality quirk that would make people think 'that guy must be really good to get away with behaving like that...'
Defied: "If I want people to take me seriously, I'm going to have to leave my bunny ears behind."
Said by an employer of Mad Scientists: "Our firm tolerates a certain level of... quirkiness, so long as it does not interfere with performance. We have found that the kinds of people who are willing to defy the laws of physics are normally also the kinds of people who are willing to defy social norms as well."