Easiest - Gotta be Deserts, Caves and
Hardest - Churches, (I dunno, I can't stop making them too spacey
), houses and castles, (same there too) and Marshes/Swamps, in my mapping lessons with Unoman, I filled 'em up to the brink with junk and crap, and he
still said they were to empty and clean O.O
OH! And
shit ship decks, how the
hell do you make a full boat with that?? Honestly T.T