I spend time on a bunch of forums with a lot of macho bs (cars, DFS, fitness/bodybuilding, firearms, etc), and the usernames tend to be things like SteelThunderNuts69 which I find try-hard - so I tried to pick the least "macho" name I could think of at the time and have had it for years (not to say it is me on every site, but it might be).
The avatar is Ferrari spelled wrong and the Mustang logo, and I had it on a shirt for a long time that I would wear to car shows. I would usually get people correcting one but not the other.