I quite like Arch. Definitely has the package manager with the coolest command name, although the usage and flags are bit archaic, they should probably steal some more ideas from FreeBSD. It allows me to build relatively minimal systems without having to compile everything from source. (yes, I'm a recovering Gentoo user)

I recently installed the latest Ubuntu just to see where that has gone since I last used it years ago. I had to wipe it after less than one hour.

I really should play around again with NixOS, looks like it has progressed quite a lot since I last encountered it.