Ubuntu or Kubuntu. Long are gone the days where I used to tinker with different Linux flavors.
Fortunately, I can afford powerful enough systems so I do not have to be worried about optimizing every single aspect of the OS.
I want things just to work out of the box. I am aware that this applies to more distros than Ubuntu, but I just do not have the time and energy anymore.
Fedora, maybe?
Edit to make my point:
It is free and open-source.
Fedora has a rather fast release cycle. It offers new versions roughly every 6 months, along with regular package updates.
Has been using Wayland by default since Fedora 25, so it aligns with your preference to avoid X11.
Allows you to set up full-disk encryption.
Doesn’t freeze its regular releases for more than a year.
Supports a wide variety of hardware and aims to offer the latest kernel and drivers.
It is a large project.