All AC4, all the time.

I simply cannot get enough of Assassin's Creed 4.  I can't believe how much it has improved upon the AC formula.  Having only beat AC1, I was surprised how far they have come and now look forward to playing the older games to see if this was a gradual progression or new to this game.  It's unbelievable to me how many different types of gameplay there are to enjoy, from the "standard" missions, to naval warfare, to fishing, to diving, to upgrading the home base, to the fleet missions, to checkers.  It's insane.  I've NEVER spent as much time doing side quests in a game.  When I look back to my favorite games of the past few years, (skyrim, bioshock, halo, borderlands) I have a tough time not putting this game close to #1 of all time.  We'll have to see how the end game plays out.