Intuition
Candidates pour weeks into cases and treat the fit interview as an afterthought — and that asymmetry is exactly the mistake. Firms are choosing colleagues they'll spend brutal hours beside; a brilliant case-solver who seems arrogant, generic, or un-self-aware is a real rejection risk. The good news is that fit mistakes are almost entirely avoidable — they come from under-preparation, not lack of talent. Knowing the common traps is most of the battle.
This lesson is a checklist of the ways smart people lose offers on the "easy" part.
Framework
The avoidable fit mistakes:
- Under-preparing. Treating fit as a formality. Fix: prepare and rehearse a story library (see the STAR lesson) as seriously as cases.
- Generic answers. "Why us" that fits any firm; motivations that fit any job. Fix: specificity and real evidence.
- Vague, unstructured stories. No clear personal action, no result, lots of "we." Fix: STAR with a strong "I" and a quantified outcome.
- Lack of self-awareness. Fake failures, no genuine growth. Fix: real stories owned honestly.
- Arrogance or passivity. Dominating, or seeming low-energy. Fix: confident but humble; engaged and warm.
- Not researching the firm/role. Fix: know their work, talk to people, cite specifics.
Worked Example
A candidate aces every case but in the fit round gives a "biggest weakness" of "I just care too much," a "why this firm" that's clearly recycled, and a leadership story full of "we" with no clear decision of their own. The interviewer's note: strong analytically, but generic and hard to read as a person — borderline, leaning no. Nothing about their ability failed; their preparation did. Had they brought one honest weakness, a firm-specific reason, and an "I"-driven story, the same cases would have converted to an offer.
Pitfalls
- Spending 95% of prep on cases and 5% on fit, then being caught flat.
- Recycling generic answers that betray no real interest in this firm.
- Over-rotating the other way — over-rehearsed, robotic answers that feel inauthentic. Aim for prepared and genuine.