I like pulling weeds. It’s repetitive labor, but it feels good every time I yank a prickly stem and up pops a bundle of roots with a puff of dirt. It feels good to make visible progress from one side of the garden to the other. I like popping Zed heads in Killing Floor 2 for sort of the same reason. It's a splash of blood and guts rather than a puff of dirt, but it’s more therapeutic than it sounds.