Got this for Christmas and enjoying it. I thought the sailing would be more exciting but it borders on Wind Waker tedium. And the battles are just so infuriating!
I'm not sure why I'm an assassin though at the moment. Most people are drafted in due to some personal cause or something. But Edward has just stolen the clothes of an assassin, an assassin who was going to defect to the Templars as well. I've been picking up contracts to kill Templars since the beginning and I (Edward) doesn't even know who they are, just that they're after the Observatory, and that was after several Templar deaths.
I am loving the low enemy detection though, in ACIII it was absurd, walk to close a guard and suddenly you're wanted for death.