You’ve probably already read a dozen different lists of “things not to say during a job interview” but in my experience here a few things that interviewers tend to notice that you said during the interview and not for a good reason:
Your appear money motivated: People who tend to talk a lot about money during the interview are often seen as money motivated and that isn’t a good thing if the interviewer figures you’re simply motivated by money. They’re worried you’ll take the job and then quit and go elsewhere as soon as someone offers you more. It’s best to let the interviewer bring the issue of money up first.
You keep asking about benefits and the expense account: As per the first point, interviewers tend to wonder why people start asking about benefits, expense accounts, and stuff like this during the interview and wonder if there is something you’re not telling them about why you’re so interested in these topics. As with money, it’s best to let the interview bring this topic up first if it’s applicable.
Criticizing your former employer: When you start to get a bit too comfortable in the interview, you can start saying things you shouldn’t such as criticizing a former or your current employer. The interviewer tends to wonder how long it will be before you start the doing the same to them. It’s just not professional.
Giving vague answers: This one happens quite frequently. After the interview, the person tells me that they thought they did a great job and answered all the questions they were asked during the interview. Then the hiring manager calls and tells me that the person answered all the questions with generalizations and didn’t seem to really know their stuff. When you avoid answering the question or give vague answers you tend to give the impression you don’t understand the question or simply don’t know the answer.
