I would say it was personal preference. Though one thing that would be interesting to knbow about would be Japanese... they have very strict hierarchial terms of address and very strict rules about how you use them (for example, if asking a question like 'would you like a cup of tea' to a mixed group you have to ask it seperately to each person based on status relative to you) so I imagine there are a lot of similar things in the BDSM world of Japan.