I already mentioned my love for the North in the Forgotten Realms in the thread that sparked this one.
Looking at Planescape, I very much like the chaotic planes like Arborea, Pandemonium, and the Abyss, and also the Beastlands, Hades, and Gehenna. Everything from Baator to Elysium leaves me completely cold.
Eladrin, Tanar'ri, and Yogoloths yay. Batezu, Modrons, Archons, and Guardinals nay.
In Eberron, I like Xen'drik and to some extend Sarlona. Khorvaire is a continent that barely gets my attention and interest at all. Eldeen Reaches, Demon Wastes, and Shadow Marches are a bit of an exception, but they are not so interesting that I would want to run a game there. In that case there are other settings I'd like to play much more.
Mostly I think Golarion is a bad setting. But if I absolutely had to run a campaign in Golarion for some weird reason, I would set it in the Northwest, in the Linorm Kingdoms, the Mammoth Lord Lands, or Irrisien.
In the Star Wars universe, my favorite sub-setting is not a location but a time: I really love the Knights of the Old Republic era much more than any of the others. The Rebellion Era is of course okay and I see some merrit in the Rise of the Empire era as well, but New Republic and Legacy era are parts of the universe I've always been shying away from.
While it's not a huge difference, the Old Republic era has a quite different feel. More wild and unexplored, with many small factions instead of a few big ones, and a more mystical Force than the later eras, which are so much more about grand politics.
And yes, there clearly is a pattern. I strongly prefer settings that are more uncivilized and wild, where it's about small groups in a harsh environment, rather than about highly developed kingdoms and politics.
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