No, I'm definitely the letter "M", the 13th letter of the alphabet in real life. /s
Jokes aside, I think I'm mostly authentic in conversations online even if I use a weird screen name or slightly exaggerate my persona at times.
Thanks for the interesting answers.I see that there are some different views on what an alter ego is
Well, I behave differently on the net than in the real life. Does that count? I'm not feeling like I have two personalities living inside, though.