Exactly what it sounds like, if you want a 3D love sim that is A-Okay.
Personally I'd like a high quality vampire rpg. Like Vampire: The Masquerade: Bloodlines, only without the bad graphics, glitches, and iffy combat engine. It's still a great game but it has issues. If my dream game was set in the Masquerade universe it would be perfect.
I also think a real life rpg would be cool.
What would you like?