Ubuntu Karmic Koala. To be fair, I was a kid and that was, according to people on the Internet, the most likely to work. And so it did - it had out of the box support for my wifi adapter, which some other distros I tried later did not, I had to use something called ndiswrapper. Of course I did not yet know about compiling my own configured kernel, that came a month or 2 later.

I only stayed on Ubuntu for a while, then tried Mint, used that on and off for years, dabbled with Arch at some point, too. In the last 5 years I’ve used PopOs, Gentoo, OpenSuse, NixOS. I’m not gonna bother with capitalization and punctuation on some of these.