I would call myself something huge and elaborate and probably Latin or Greek, like Antigone or Felicitia or Agrippina. In short, the sort of names I never could have sustained when a tiny baby but could certainly have a bash at now.
Also, I would have a double-barrelled last name. One of them would be French, or possibly Spanish. The other one would be my ordinary one, which is pretty cool in its own right.
And for my confirmation name, and choose some mad Anglo-Saxon saint's name like Kyniberga instead of the vanilla one I was persuaded to plump for.