My comment was a little bit short. I have used plenty of window manages in the past: window maker, blackbox (now dead I guess?), gnome (from the era of RedHat 6.2 onwards), KDE, Ubuntu desktops (I don't know if is Gnome tweaked or something else). Perhaps I stay loyal to i3 because it was the first tiling manager that I tried and seemed pretty straightforward to be productive with it. Have to try other ones as well but never find time to do so. Same story happened to me with Vim. I still need to give Emacs a shot.