Strong candidate, great background, didn't get the offer. The reason had nothing to do with his skills.
He came in with a solid resume. Big company, real projects, clearly knew his stuff. But the whole interview he talked about himself. Every answer was "I decided", "I pushed this forward", "I identified the problem." Never once mentioned a teammate or a decision that involved someone else. One of the interviewers said afterward, it feels like he did everything alone.
We didn't move forward with him. Not because he wasn't capable, he clearly was. But we had no idea what he was like to actually work with. How he handled disagreement, whether he gave credit to people around him, what happened when things got complicated with the team rather than the project. None of that came up. I don't think he was being dishonest. Some people just talk that way, especially when they're in interview mode and focused on showing impact. But we ended up knowing a lot about what he did and almost nothing about how he worked with people.
If you're prepping for interviews, it's probably worth thinking about where other people show up in your stories. Not to downplay what you did, just to fill in the parts we're also trying to understand.