Up until last year I would have said Ubuntu. It was qualitatively the best desktop choice when I started with it in the aughts, and is still one of the few distros that has a reasonable out of the box install option with LVM. But I recently tried a Silverblue variant and NixOS, and I like what I see. Once I’m comfortable enough I will switch, I’m tired of the ensnapification and the Pro nag screens.