I started with i3 now and having experience in vim (aka a keyboard-centric editor) it was really easy to get into it, the customization was super simple to understand and I’m really happy with it!
I had some minor issues with multiple monitors at first but it was cause I hadn’t configured them in the config file. There were also some issues with notification icon handling in the i3 status bar and it seems like that has been ongoing for a while. It’s a little bothersome but I can look past it.
Then only other thing I struggle with sometimes now is when I go too far up the tree as I find it hard to tell visually which level of parent I am on and what happens when I then switch the horizontal / vertical / tab / stack modes and how it affects the children etc. But I assume I’ll get the hang of that with further use.