To me, it seemed like AOEIII was trying to put too much reality into the game and that made it that much more unrealistic to me. I never really liked how each individual unit had health bars, suffered from those stupid robotic attacks, and never healed in a more convenient fashion. The earlier Age games were fun for what they were.
Why do I not like AOEIII? Personally, real-time strategy board game play has had its time. This is an old game and if you want praise, just take a look at the other reviews on this site.