I use this on just about every single website there is. Youtube, Toyhou.se, Refsheet, Aterenos, Roblox, Minecraft, Twitter, Instagram, Tumblr, Artfight, Facebook, Spotify, Medibang artstreet, Microsoft, my own PC's files are named ThlisikTonix, Discord, Pony.town, Ashes.town, Gmail/Sheets/Docs/Slides/Etc., Flight Rising, planetminecraft obviously, namemc, the skindex/minecraftskins.com, Etsy, Yelp, et cetera. Name a website, and if I'm on it, I'm definitely using this username.
Fun fact: I came up with it on Minecraft and I go by Tonix IRL! It's fun.