What game should I play next?

Assassin's Creed Brotherhood is a great game with a fun campaign and great environments. The multiplayer is excellent and tastefully implemented. The characters are great and the sound perfectly suits the game. However, Brotherhood falls short of Assassin's Creed 2 due to a lesser story which lacks the emotionally involving story of AC2. The game has some odd glitches and the mission parameters that result in de-synchronisation are infuriating and should be removed from this series AT ONCE.