I think it´s the best AC mostly because of the pirate setting. I really like it that you spend 50% on the Ship and 50% on Land because the Naval combat is great. The World is actually one of the largest AC Map but it´s mostly just water and you always have your loyal Jackdaw to bring you everywhere. The story is really epic but nothing too crazy and not the best in the series (That honor goes to AC 2 and Revelations for me). The combat system is really fluid even though you are basically a demi god because even 100 soldiers couldn´t stop you (at least it feels like it). It´s still very fun and never got boring just like naval combat where you can be killed very quickly in contrast to the battle with swords and guns.