Hard to choose which games I'd want to play. It'd feel incomplete without certain games. But then certain games have aged badly. And there is A LOT of content. I don't know if anyone needs that much Assassin's Creed.
Just start at the beginning and release them in chronological order with the numerical games (1-3). A year later, give us volume 2 with Brotherhood, Revelations, and Black Flag. Then go from there.