This is another very good question because it helps to pin down what makes you tick, what you really like and what would put you off. This is about self-knowledge. You need to appreciate what turns you on and off and what has helped to get you to where you are today. For example, if the things you did not enjoy were allied to what you are applying for now, that would rule you out because you would be getting more of the same in another form. It also helps to draw out your sincerity in what you really desire in your life. So make sure you really know how you felt about your last job so that you can identity what you liked and disliked about it in order to get more of the enjoyable bits.