#5, definately. The most varied by far, and has some really neat features. I also see you made some improvements to the PW map, and humans now appear on the island continent. Good stuff. Although the humans that used to appear in the top right are gone, leaving a big emptiness there.
Runner-up #4. Because its the best out of the first 4, looks a bit prettier than the fifth, and the thought of our humble tropical island fortresses being besieged by zombie whales and zombie sea monsters (ala #5) is a bit much. (but as we know, not all evil regions do that)
Shall we hide history in the final version for us/the adventurers to discover themselves? Could be fun having only the player-impacted events be visible, but at the same time, players have the option of hiding history in d_init as well. Culling unimportant historical figures doesn't really affect anyone (especially with history hidden), so that's a definate yes. What about caves?
Edit: I regenned your world and the regions turned out quite a bit different. Different raws, different version perhaps?
I really like some of the names in this one. The Past Dimension, The Vanishing Continent, The Faded Plains, The Fresh Island, The Hill of Hell, the Pond of Pondering, The Innocent Waters, The Gory Sludge, The Angry Ice.
Edit2: And the ocean has evil rain that causes total blistering and suffocation, evil husk mist, AND reanimates the dead.
No way adventurers are swimming across that.