Well put. As someone who does a lot of hiring, I know I'm not talking to a candidate because they're happy with their current job. But at the same time, I want

Well put. As someone who does a lot of hiring, I know I'm not talking to a candidate because they're happy with their current job. But at the same time, I want to see that someone has the necessary judgement and discretion to not bad-mouth their current employer, especially when I know that one day, that could be my company. Also, when a candidate does speak negatively about their current employer, you're left with two possibilities: it's really that bad, or they're not a good employee. As a candidate, you don't really want to raise that possibility in anyone's mind.