Vampire: The Masquerade due to familiarity, probably Camarilla clans, with me using a chunk of Requiem ideas like the second edition expanded Humanity system and some character and plot points.
Episodic and occasional, so aiming for a relatively small number of subplots and NPCs to track.
Probably using my last games as source material.
Planning to give the coterie a good reason to work together and not run off to play three personal games.
Already said “don’t betray the party, there are only three of you.”
And plots. Hm. That’s the real trick...