Which one would you recommend for regular users and power users?
Not joking, Arch. Pick Gnome/KDE/Sway as you please.
Arch is a wonderful daily driver distro for folks who can deal with even a small amount of configuration.
Excellent software availability through AUR, excellent update times (pretty much immediate).
The only downside is there's not a ton of direct commercial software packaged for it by default (ex - most companies they care give a .deb or a .rpm) but that's easily made up for by the rest of AUR.
It's not even particularly hard to install anymore - run `archinstall` https://wiki.archlinux.org/title/Archinstall make some choices, get a decent distro.
Throw in that steam support is pretty great... and it's generally one of the best distros available right now for general use by even a moderate user.
Also fine as a daily driver for kids/spouses as long as there's someone in the house to run pacman every now and then, or help install new stuff.
Arch or Endeavour
Debian/testing, with stable pinned on at low priority.
It slows down for a couple months around release, but generally provides pretty reliable & up to date experience with a very good OS.
Dance dance the red spiral.
If you want something relatively uninteresting: Fedora or Debian (honestly, stable is fine).
If you want something extremely reliable, more modern, but may require some learning to tweak: Silverblue or Kinoite.