God damn, if you are OCD like me this game is looooong. I have one more assasination left, but I'm really at the point where I want it to end. It's a great game, one of the best of the year IMO, but there's almost too much stuff to do. Venice is almost as long as most reatail games. The glyph puzzles, assasination side contracts, villa, paintings and tombs are great, but stuff like the treasure chests seem pointless. You max out the Villa way too soon IMO.
While there is variety it does get repetitive by games end and, honestly, AC1 felt a little more focused and cohesive.
Sadly, as I near the end, the game has left more questions than answers. The story starts off strong but the last half just seems to drag. I honestly don't remember why I was supposed to assasinate half the people I did in Venice. Also, I actually miss Desmond parts. It was a nice break in the action in AC1.