Does your own mood and demeanor change when your character changes costume?
You can enhance you avatar by attaching a number of different subroutines to the base. So in my harem girl persona my face cycles thru a number of flirty\playful expressions.
When I am a prisoner or being tortured I use a different set of facial expressions.
I also have a number of sound animations that I can add to a character.
I always try to play the character as I think they would have been. I am more of a 'reenactor' than an 'actor' in that I can imagine myself in a variety of situations and act as my RL personality would act in that situation rather than pretend to be someone I'm not (More of a Kevin Costner than a DeNiro).
So let's examine the Gorean Tavern girl for a moment. I am a slave in a culture where any woman could wind up being enslaved, I have no rights, I am considered property and a "beast". Working the tavern I am expected to bring in money for my owner who has the right to punish or even kill me if they wish. If I don't satisfy the customer, he will not come back and buy more drinks\food, he may even complain to my owner. If I do satisfy him he may treat me with kindness, compliment my performance to my owner (thus enhancing my value to the business) and maybe even tip me with some small amount of money. Conceivably he could decide he wants to own me and my days of servicing random men are over.
Obviously it is my best interest in making the customer happy even if i have to fake it.
I carry that over into my attitude about cyber sex. In RL I love giving oral sex but hate anal. So oral is no problem in cyber sex but what about anal?
Let's look at this from an ancient slave girl's perspective for a moment. Birthing is a very dangerous activity with a high mortality rate even for those of wealth. In most cultures (Islam and early Judaism being major exceptions) the child of a slave can not be legitimized unless the mother is freed by the owner who impregnated her and then he accepts her as a wife. So in the long run, avoiding getting pregnant is a practical strategy.
While men want to procreate the vast majority of the time they are into sex for the sake of the pleasure it brings them. A man who orgasms into a slave's mouth or ass is pretty much just as happy as if it had been in her pussy. He gets his pleasure, the feeling of dominance that comes with penetration and I avoid getting pregnant.
So as you can see from above, at least for me, there is more to RPing than just spreading your legs and yell "Oh, baby, baby, do me".
I hope I answered your question.
kisses
willowfall