Ubuntu is good because its popular, which means its well supported and you'll find instructions to get just about anything running. Ubuntu is based on Debian, so just about any Debian based distro will benefit from those docs. Fedora is great too and also just werkz.
That's true, but in distros based on Archlinux you have AUR packages. It has practically anything you might need, even strange things that you won't find in any other distro.
I personally recommend Garuda Linux.
