My distro is the best because I customized it to my needs. Also because I used it for so long that I know how to do almost anything on it.

Hannah Montana Linux

I use Arch, btw, but I don’t consider it the best (yes I do.) I could easily transition to Fedora, for example (I would never do that,) and be completely happy (I would rather continually hit my head with the metal stapler gun on my desk.)

Does what I want and gets out of my way.

You mean my distros?

Different distros are the best for different purposes.

My Fedora is the best for my laptop because it just works and all the hardware is supported.

My Arch is the best because it’s a super fine tuned setup that prevents distractions and doesn’t waste memory or CPU doing things I don’t care about.

My mint is the best because it’s simple, stable, beautiful out of the box.

My debian is the best because servers are no nonsense.

My puppy Linux was the best when I was a developer for the distro because it was the smallest lightest and fastest distro I’ve ever used.

Etc.