This is the best Assassin's Creed since AC2 in my opinion.
Edward is also the best main character since Ezio. He's a lot like Ezio in some ways but also very different. Both are charismatic and confident, but Edward is way more self-centered. Ezio buried himself into the role of an Assassin as he got older while it is clear that Edward is a Pirate first and an Assassin second (well said by who said that!).
AC2 did a lot to take the franchise to new heights but I think ACIV puts it on another level. I love the setting and seeing all the historical pirates is awesome too. There's a lot more heart put into ACIV than there was ACIII and you can tell. I also enjoy that there's also more ties to the Assassin/Templar feud than what we saw in the previous installment.
The game is STUNNING on Current Gen. Which I'm sure means it'll be only better on the Next-Gen. The graphics are crisp and the animation is fluid. There are VERY little load times, you might be surprised how easy it is to travel the sea and then stop by a little island cove and realize that it's bigger than it looks on the map. The only times I see significant loads are to/from major hubs and to/from the Modern times and this is on CURRENT Gen.
The only thing I don't like is I miss the controls from AC2/AC:B/AC:R. They simplified them in ACIII but I think it was mostly to make things appeal to the broader audience than the AC fans. I also feel the counter mechanism isn't as sharp as it used to be.
Even if you are NOT an AC fan, this is an AMAZING Pirate game (and if you don't like the AC outfit, don't worry, you can give Edward a more Pirate-y outfit). The sea elements borrow from Sid Meier's PIRATES! where you cruise around the West Indies and attack ships and loot and plunder. Although you can't change your ship, it is an extension of your character and requires upgrades to attack larger vessels, especially the Legendary ships! Even the detail at sea is fun and the battles can be different as you level the Jackdaw you'll find yourself more comfortable attacking that convoy of frigates when you were nervous just going after just one.
There is so much to do and I have to give credit to Ubisoft for kicking it up. They have never been afraid to introduce new elements into the Assassin's Creed series which sometimes work and others times don't, but at least they know the variety is important.
If you're an AC fan, or took a break from the series, a Pirate fan or even a newcomer, this is the perfect game to jump in on!
If you're waiting for Next-Gen, please get it then, I can only imagine how great this game looks on the XBox One and the PS4.
I have put probably about 20 hours or so into the game on my 360 and it has not frozen on me ONCE. Considering the immense size, you can see that Ubisoft even worked on the bugs that had hampered previous AC games.