There will often come a time in your quest for professional satisfaction when you will attempt to break free from the shackles you’ve been in for so long so that you may find new ones to attach yourself to. In order to achieve this, you must prostrate yourself and act like a plucked turkey with a hand shoved up your ass (a.k.a. go through the interviewing process).
An excess of confidence will ruin you and so will meekness. Either trait can result in being deemed “uninterested in the company” or merely “in it for yourself.” And, of course, never confess to the interviewer that you aren’t a morning person. They don’t like that either.