I use Manjaro, but I run it like vanilla Arch (for example pacman/yay and not pamac). I find this to be a sweet spot for me - rolling releases are so incredibly nice, and Manjaro being slightly slower than Arch is good from a stability standpoint in my experience.

I use ZFS all over the place, including the root storage pool on my home server, which has overall been a great experience with systemd-boot.

i3 is what I’ve been using the past few years. I’ve tried others, but I always end back up with i3 as I’ve found nothing else to be as simple and efficient for my workflow, with 12 workspaces across 2 monitors.