Both of my therapists have asked me "What would be different if Joanne showed up for work tomorrow?". My reflexive answer was Nothing. OK a few jaws will need to be picked up off the floor. I'd still be the same me. Just feeling, or better yet, being 100% genuine.
About the only times I do have an alter ego is when I am fully presenting as female and sometimes refer to my male life as my alter ego. Pre-everything, there was Waaaaaaay too much stuffing to even allow the concept of a female alter ego.