Interview is all about honesty. I think there are 2 things you could say. The first reason is that you have been in your current job for a long time and you hav

Interview is all about honesty. I think there are 2 things you could say. The first reason is that you have been in your current job for a long time and you have learned a lot and became good at it. But it is not giving you any more challenge and growth that you are looking for professionally. Another reason you should think about is why this company is a better company than your current one. There is got to be a reason why this is a better fit for you professionally and personally. It could be what the company stand for, what they sell, or the technology you will be using, you name it.