I'm not a massive fan of job interviews, but it really depends on the structure of the interview. I despise the useless structured HR interview questions with every fibre of my being. The best interviews I've had have been chats about myself, my experience, what I can offer, and discussing what the company needs, with some technical questions thrown in there by the interviewers to validate that I do have some idea on what I'm talking about.
I'm confident enough to say what I know, and to admit what I don't know. I'm pretty sure I've won points on several occasions where I admitted to not knowing the answer to something, and then finding it out for the next interview stage.
Ultimately my accomplishments and skills speak for themselves, and in my line of work people generally care about what you know and can do, not what bullshit you can spout for some form.