Have you ever tried it? I have an overly communicative Chihuahua, and when she starts sounding off to me about whatever, I will affect an accent, and say things like, "Such Impertinence! You will soon pay for questioning my power!" And things like that. Try it. It's fun. You can run the gamut, from Sci-Fi favorites to Comic Book bad guys, and even cheesy Western characters. I think dogs appreciate these types of efforts.