My multiple personalities* are confined to OFF-LINE, thank you. MMario is MMario is MMario when posting to the 'cat. In fact, pretty much anytime posting to the net.

With the few very rare exceptions when I post for "Dido" (Cleigh's Sister) or Stavros - my evil identical cousin.

*and they aren't in disorder, I know where they all are.

I suspect that while you may not be unique among the posters here, the percentage who follow your practice is (are?) few. Most of us, (even regulars who have not chosen to become members) seem to choose one name and stick with it.