LOL! I seriously hate mine now. But, I use it everywhere because it's so easy for me to remember. Plus, it makes it easier to find me if anybody from other websites want to find me on other websites.
The 't' - I have no idea where that came from. Maybe my mom's first letter in her name? I honestly can't remember.
The 'catron' - EASY! I won't tell you what it is, but it's pronounced like "catch wren". NOT "ca tron" I'm not a freaking robot!

The '565' - Extremely easy to remember number. It's always nice to have a number in your username. Spruces it up a bit.
If I would've known how much I was going to use it back then, then I would've changed it to something better. Maybe ACatron94. I love that one a lot, but I honestly don't feel like switching from tcatron565 since I use it everywhere and it's super easy to remember.