Edit: I’m glad so many of you have had no issues with multiple monitors. My set up is a little unusual (3rd display is an infrequently used large tv hooked through the receiver) and is definitely solveable but will take some effort (and honestly, I’d rather spend my spare time outside or with friends, so who knows when I’ll fix it.)
Ime over years… I stopped tweaking.
Gnome with dash to dock is basically all I need unless I’m doing something specific.
Even when I was making htpc with KDE I started out customizing everything but eventually would reformat and only use a few minor tweaks. I went for like week long constant tweaking every time I used it to being able to set up an install and a few tweaks in less than an hour.