I have my masters in Psychology, working on getting my doctorate and I'm going to have to agree with your shrink. "Roleplaying", if I may call it that, is much more normal than people like to admit. A lot of people get embarrassed by admitting to wanting to be like, or sometimes just wanting to be, someone else. Not to get into a psychological analysis on you, but it's an incredibly common way to deal with problems or stress, however trivial, in one's own life. We do it constantly. Look at all those "What would Jesus do?" stickers. What is that, exactly, but a form of idolizing or admiring someone to the degree of wanting to mimick their actions or ideals. I don't know you personally, of course, but it sounds like you're not taking it too out of the box with this.
It's considered pretty much normal, even if you're muttering to yourself, to roleplay internally. Or externally. So long as an individual can differentiate between their real lives and personalities, and their roleplaying identity or fantasy, there's nothing wrong with them.
Go around saying "I AM Marie Antoinette", however, and there's something a bit wacky.
(I've lived in various parts of New York all my life, particularly near and in the city, and we tend to have a blended culture of American, with every other culture out there. So I've always heard 'cutlery' or sometimes 'silverware' even though it's not silver. It may not be like that in Idaho or somewhere else in the USA.)