Bad Manners and Brimstone

Focus more on why you want to work for them, what you're bringing to them, and less about why you want to leave.

I've had a great experience since starting as an intern with x firm and have established a strong base in "specialty" area. I believe that with your firm, I'll be able to use leverage that foundation for the benefit of your clients but also grow my skills and competency in speciality area.