Honestly, it might sounds harsh, but: I know you like the name, but I don't think it is very original or professional.
This (not very funny play on Domains-Dominatrix) is pretty much the first word play that comes to a guys mind with the word domains, this whole thing is not very new or creative I am sorry to say.
I could write a whole paragraph about the inability of women to be funny in the eyes of men, but I won't go there because it might be mistaken as a rant rather than facts because there are always people that think they need to defend facts if they think something is not PC.
Interestingly enough the suggestion you like the most is a copied idea from a "chickflick" movie/Nike commercial (just domains..no tricks). I am not surprised that you like that suggestions the best, that is because the original add is geared towards women, but you need to think about who your customers are, probably 95% men.
I would advice against using old ideas like the whole "master of your domain thing". People used that 5 years ago, it wasnt funny then and it is not funny now. Try using something original.
Maybe you think this guy humor in this thread is not funny or fitting, but those are your customers. And if you stick with your name (which I wouldnt) you would need to stick with your theme, the rude seeming comments here are probably the best because they are original and draw attention. Stay away from old phrases and ask yourself what would draw more attention and visits. Your name is already unprofessional IMO as it is bringing sex in the equation right away, so a professional sounding tagline will sound awkward and lack effectiveness. Either follow your theme all the way or dont follow it at all.
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