Depends. Whatever choice you pick - go with Plasma (KDE) desktop. Most of below choices have alternative desktop flavors that offer Plasma instead of Gnome.
If your goal is to play games - something like Bazzite might work.
If your goal is to have a desktop experience with some gaming, something like NobaraOS or PopOS would work.
If your goal is only desktop experience - ubuntu will work.
If your goal is to learn and have super awesome Linux desktop - Arch Linux.
Personally I am in Arch Linux for the past decade. Tried many different ones and Arch Linux is the only one that simply “just works” for me. Not suitable for beginners.