IMO, definitely dump Ubuntu as quick as you can. Linux Mint is a great Ubuntu-based alternative that gets you all the benefits of Ubuntu (plus some) and none of the Canonical bullshit. If you want to divorce from Ubuntu entirely, LMDE is a great project that rebases Mint on plain Debian! Another lovely project by that team.

Personally, my first pick daily driver is OpenSUSE Tumbleweed. If you like playing with config files and the idea of hyper-replicable system setups NixOS is a very interesting project that I've enjoyed a lot in the past.

CachyOS is getting quite a lot of attention recently, and as far as Arch-based distros go I have enjoyed using it. It has a lot of performance claims, but does come with all the drawbacks of ArchLinux and bleeding-edge rolling release distros -- not that it's a terrible experience, it just requires you to be more mindful and more capable than your average distro, especially if you're going to utilize the AUR.

TL;DR - there are a boatload of interesting distros out there. My first recommendation would be Linux Mint/LMDE for familiarity and ease of entry.