Age of Empires III is the best strategy game of the present.
If you have played AoE II, you'll see many differences such as the use of metropolies that gives you benefits such as units, goods and advanced technology that improes your army and your economy.
Although this revolution inserts more action in the game, at first sight it seems to be confusing and don't impress many players.
If you started playing it now and you don't like it, i suggest you to give it some more time because you may not be adapted to the news.
The graphics are good but could have been better.
The sound is ok, not more than that.

I recommend this game but i'm sure that there we'll be many people that will still prefer the past AoE.

Cheers