You can change your username on these forums! This has been discussed in some other thread before, but I thought it wise to make a nice little guide thingy here. Luckily, this is going to be a short one (especially when compared to the new Code of Conduct I’m writing…)
Click on the following link: link.
If you’re not logged in, you’ll be asked to login first. Login, and you’ll be redirected.
The second topmost textbox is for your username. Fill in your desired username, and click update.
Go back to these forums, logout (profile image right top of screen, ‘Log Out’), and back in again.
World domination! (And profit. Don’t forget profit.)