This is a good place to tell your interviewer that you are flexible and open to change, and look forward to all of the challenges involved with making this move. You can also mention that you don’t see yourself as being rigid and don’t believe others see you that way either. No matter whether the move to this new company is a lateral career move or one of advancement, you should express that working for this new employer is a step up from your last job, or it’s an improved environment, and cite an example of why this is a better place for you and the advantages that your being with this new company afford them. Change is good!