Oh, man. Foraging. Hands down. I am entirely biased, but foraging is OP, in my opinion. Sure, you can't grow tons of cabbages with foraging, but you can find dead squirrels, berries, nuts, and tons of insects. Not to mention you'll find usable tools like chipped stones, branches, and sometimes car keys. Farming is cool, but it's singular, takes forever, and involves so much work. Foraging is where it's at.