For me, it's ROM, of course! Because of spellcasters and potions, I was waiting for them since the Sims 4 release day.
But I wouldn't give any advice cause some players may prefer sci-fi settings and storytelling over the fantasy. For those Strangerville fits better. Strangerville is a good pack, really. I like the shabby and dusty atmosphere of the town, it's perfect for building run-down households. I can see plenty of ways to play with this pack even if you avoid to deal with Strangerville mystery. And the main feature of this pack, I think, is playing for "paranoid" sim. You not only have the trait and some devices, but you also have the real reason to be paranoid!
P.S.: it's funny that choosing the Realm of Magic over the Strangerville pack, I'm actually defending the last one. Well, I would really appreciate more "storytelling" packs, I think that Strangerville was a good experiment. While ROM is just what was expected.
