I am a hiring agent with my organization, which basically means I do lots of the interviewing. I am always glad to hear when someone tells me they are looking for opportunities to grow and advance, and that is a reason for a job change. I know I work hard at relationship building with my staff, so I am fine with them telling me the reasons they are staying here and the reasons they are moving on. The same goes for me with prospective employees. If you are open and honest but not derogatory or even whiny about your current position, I have no problem with you telling me why you are looking to change jobs during an interview.