User of CentOS and Ubuntu servers myself. Mint is still top go-to for desktop, though there are interesting alternatives like ElementaryOS.
Linux is not always easy to learn, I just forget everything if it's not regularly used, especially CLI with their bazillion switches that no mere mortal can ever memorize. And moving between different distros where commands don't work exactly the same, Aptitude and Yum, etc.
Cool, but always challenging.