Like Saralin and Vale I am the same person with the same core values regardless of how I'm dressed. When I first told my wife of my crossdressing I was using the name Debbie, to which my wife replied you don't look like a Debbie you look like a Jill, so I adopted the name Jill. My wife also told me that if I dressed as a women she would not tolerate me acting like a MIAD, which is fine with me because when dressed I have always tried to adopt feminine mannerisms and tried not to walk like a lumberjack in high heels. I also try to soften my voice to a more feminine tone especially when out in public.
So to sum up I am the same person when dressed with the same core values that adopts feminine mannerisms, walk and speech patterns when dressed.