I downloaded mods to keep the existing premades from being turned into spellcasters and to keep them from entering the portal to the magic realm. I'd say those are my best post RoM mods. I don't want to see the Goths or any other well known family in the magic realm. It's just not what I had planned for their lives and I don't like having it forced on me.
Downloading lilsimsies magic realm made a big difference to my game. It replaces the boring empty premade magical building that Maxis placed in the magic realm with a much more detailed building.