How many different versions of Linux do you use?

Those of you with multiple computers, do you have the same distro on all of them? Do you have different distro for a different pc? I assume some may have a different one for gaming pc, work pc, etc., but really just curious is all!

How many different distros do you use at a time, and why?

Edit: I'm currently rocking 2, about to add a 3rd. I have Mint Cinnamon on an old laptop that I use when I'm chilling, Dual-booting Ubuntu original on my work laptop, and converting my new gaming pc sometime this week.