Idk about favorite but Mint is the one I've been using for the longest - more than 2 years in total time of usage.
Manjaro has a big problem with grub2 - a problem that needs to be fixed. Right now you won't see it but if you install Mint 18.3 or an older version in the place of Manjaro, then you'll see the problem: Manjaro breaks the storage device's MBR thus making it impossible to boot a Debian based distro whose grub is installed inside the file system. Mint 18.3 and older versions use legacy grub which can be installed inside the file system (exactly like Windows XP years ago). Mint 19, Manjaro and newer distros use grub2 which can be installed ONLY on the device's MBR. Once that MBR is broken, the user will have to run a live CD and use
sudo apt-get install lilo
sudo lilo -M /dev/sdX mbr
* replace X with the storage device letter
or run the Windows DVD installer and use its command prompt to fix MBR.
Manjaro is the only distro with this problem. The other Arch based distros don't break the device's MBR which makes them a lot better than Manjaro.