Nerves aside, most experienced candidates can give a decent job interview. Prepare 2-3 stock answers, pivot away from risky topics, be courteous, and above all, smile.
That’s why when interviewing writers for my content agency, I was surprised when a candidate who had tested beautifully started rambling, overshared, trashed his former boss, turned belligerent, hedged every question, and basically talked himself clean out of the job.
Beyond cultural fit, I couldn’t imagine putting him in front of a client, or even shooting the breeze with him at lunch. The consensus from my colleagues was