I personally hate being addressed by title so I'll take my cue from you on what you want to be called.

For some reason, commencement ceremonies are always these highly ritualized affairs, the doctorate ceremony especially so since there's that hooding thing that happens. (I skipped my own commencement. If I ever go back into academia, I have no idea what I will do for regalia. That will likely be the least of my problems though.)

Anyways, congrats! It's all over and you can get on with your life!