The eternal question... Which Linux should I use?
Back in 2009, at the company where I worked back then, we decided to consolidate our Linux/Unix servers on a common distribution and had a very long and thorough discussion on the topic. We did not want to use a distribution that would force us to purchase support contracts or even licenses, so Red Hat was off the table right away. We also did not want to rely on a pure community-supported/-driven distribution, so Debian and CentOS were off the table as well. We still wanted to have the --option-- to purchase support from the distribution's manufacturer/creator but at the same time we still wanted to be able to obtain the software itself free of charge, since we needed to keep the software costs as low as possible.
I think by now you all have guessed what the answer to these requirements was: Ubuntu.
It was a good decision and I never regretted it. By now, even Dell considers Ubuntu an "Enterprise-Grade" Linux distribution and fully supports it on their server hardware and even certifies their servers for Ubuntu. Ubuntu has never let me down over the last twelve years, and I'm talking about ISP-level deployments in global networks. Ubuntu gets the job done, is well documented and well supported - and still has great free community support.
On the desktop, Ubuntu 20.04 LTS also is my personal favorite among the armada of existing Linux distributions. On weaker/older desktop hardware, I use Xubuntu, which is a great alternative. I never liked the Ubuntu-based Linux Mint; in my experience, the repositories are half of the time offline, at least when you try to access them from Germany, and Cinnamon neither provides the user experience that I want nor does it feel stable and reliable. I know that a lot of people love Mint, but I'm not one of them. I also do not like using KDE - it reminds me of a car tuned and designed by an 18-year-old and brings a lot of nonsense with little substance. To each their own. If the Linux world has one big advantage, then it's the fact that there is something in it for everyone: Knock yourself out!
I do not use the "interim" releases of Ubuntu and always stick with the LTS versions; the interim-releases are basically development versions or betas and only "live" for a few months. I don't burn my time on them.
tl;dr: Ubuntu++