Definitely the anonymous username where possible. There are exceptions here and there (well, mostly LinkedIn and job hunting sites), but for the most part I pre

Definitely the anonymous username where possible. There are exceptions here and there (well, mostly LinkedIn and job hunting sites), but for the most part I prefer the username. There are a few reasons for this: 1. My username is actually less common than my name is, so it's more likely to be available on a service and less likely to get confused with everyone else. 2. I've always been taught that you should be careful with your personal info online, and consider it a good opsec to be such. Why give random strangers information that they can use to track you down for god knows what reason? Especially in a world where death threats, swatting, people trying to get you fired and extremist lunatics are a reality. 3. I just prefer traditional pseudononymous sites and forums over modern social media, and going by a username keeps that feeling alive just a little longer.