Best versus worst Linux distro

I have replied to a few discussions, so now I will create one myself.
I would like the opinions of those familiar with Linux to rate their experience with various distributions. It could be the best or the worst.
If the best how come? Was it ease of install? Maintenence of the os? Included programs?
If it was the worst what happened to make that decision ? I’m interested in whatever might be said.
By the way , running a quad-os system here, so would be neat to see which distros you have tried that I haven’t. I’m always up for checking out something new.