I just don't like the idea of day-to-life in a Dom/Sub relationship. I like the potential of being overpowered in the bedroom, and although I am loathe to admit it, it's sort of like a rape fantasy -- but I don't like [much] pain. My date was a rather large man, at 6'5" and 280 lbs, so that came into play, too, feeling a little dangerous.
However, I am always very cautious about any of this stuff.
I have always had fantasies about a rape scene. But I've never gone through with it-big trust requirement there (and the right partner).
As for D/s, whilst there are those of us who do it 24/7, I think you would find in some cases (mine for example) that what that means isn't what you envision.
For example, there is NO "yes sir" or "no sir" in my dynamic. NONE. Not in any place or any time and there are rules that pertain only to when we are in the bedroom and alone. There are other little things we incorporate in day to day life (like making the bed) which seem totally "normal" to the rest of the world, but who does the bed making is the point in our dynamic and it results in making the D feel special and honored. Likewise there are things that are/aren't done, like sitting on the floor in front of the D when watching a movie or hanging out in the livingroom. Again-in a house of 10 people where there are only 5 seats in the livingroom, that looks normal to everyone else, but it results in making the D feel special and honored.
It's not about the "WHOLE" of BDSM every day, all day long. That would take the specialness out of it.
But-yesterday I wore a specific necklace designed strictly to remind me and Him of our D/s relationship-which is in practice mode still. It had NO BEARING on the outside world, or even people who know us. But it resulted in making us both feel special and making me feel excited and turned on by him and ideas of what might happen later.
THAT SAID-you can always do D/s activities at whatever amount appeals to you.
You can always do ONLY the actitives which appeal to you as well.
It's all your choice, your life, your choice.
So if you only like the "good girl" aspect, figure out what things he likes that make him want to say that, that you also enjoy doing and throw 'em in when you want to!