i dont have much experience with xmonad but i tried every wm at some point. usually the things that keep me with dwm is that i found a build with very sane defaults and a number of patches i appreciate like swallowing, fake fullscreen(so you can fullscreen a program inside the assigned window) or xresources/pywal integration . i also love the scratchpad implementation and the tag system with a tag 0. i also like dwmblocks for the status bar . now im sure some of this features are available on other wm but i never found all of them in one like on DWM.
i also use ST as terminal and it works great with dwm while it gives me issues with other WM(usually resizing issues)