In my opinion Assassin's Creed 2 was the peak of this series and now it's going downhill, the characters weren't interesting, the story was mehh, and the gameplay is 'sticky'. The whole thing with the money, trading, and buying new things for the homestead is nice... I guess, if you like that kind of stuff, but that's not just Assassin's Creed. AC3 is still a good game, just not up to par with the level they set for themselves in the earlier titles.
Great game! Much like the previous version, but much richer storyline.
However, I sometimes find myself stopped playing just to look around at the BREATHTAKING background imagery and graphics...seriously
This game has the best backgrounds I have ever seen and it really can get you "lost" in the game world.
Keep up the excellence Assassin Creed game designers!