I use stumpwm, but to be honest I think I barely added any config options. Sloppy mouse focus was one and another to take screenshots with flameshot. Sloppy mouse focus in particular is huge. Works well with a tiling wm imo. The cursor tells me where my focus should be much better than a thin little outline moving around the screen. I was intimidated by all the lispiness of wms until I realized that I'm pretty content with out-of-the-box functionality and google got me the rest of the way.

Similarly, I've memorized new window and new horizontal/vertical split for tmux and that's like...98% of my usage so I'm set. vim definitely requires more effort, but the payoff for me was making it so that I'm always either in the terminal or in firefox. I still use the arrow keys to move around in documents and I've been using it as my daily driver for work for years.

As a result, I have two monitors, one dedicated to firefox and one to the terminal (includes vim + db clients + everything else). I don't split my terminal like crazy, almost very tmux window is fullsize. I split vim 3-4 times at most and make use of a buffer-switching list thing that's way more intuitive to me than remembering the vim commands to cycle through them.

Most of the reason I use a wm is because for two applications, I don't need window decorations and it just seemed like a waste in general.

For the amount of power-user tools I use I feel like a totel poser. But it works for me, and I think that's what matters.