No need to argue over this gentleman.
I personally use Debian, but have not recommend it here for reason. Even though Ubuntu/Mint is built on Debian.
Ubuntu focuses on GUI and ease of use, which for users coming from windows and or beginers that are not interested in learning command line is a great choice. It's the perfect starting point with the largest community to turn to for help and guidance as well as the largest repository. Many things such as taking care of proprietary drivers, proprietary software which Debian doesn't, such as media codecs which Ubuntu asks the user about during the install makes this a better option for those just starting out.
Once a users gains understanding of Linux, they can graduate to more diverse distros.