Byzantine_1
Chieftain
I would like to see more customization between the different civs. Example: An English forge might not yield the exact same output as a German forge. It might yield better when producing ships, while the German forge yield better when producing land units etc...
Great idea, what if it was taken a step further and you could choose what effects it had? Like you could tell an aqueduct in a healthy but starving city to use it's water to turn mills to create more food, but at a loss of it's health effectiveness.
Anyway, seeing as how everyone loved the Maya videos, here's the first video for the others. You should be able to find the other parts from there

The Classical Greeks
http://www.youtube.com/watch?v=JqGTCgL3tcw
The Hellenistic Greeks
http://www.youtube.com/watch?v=TQeCkYIoMCI
The Persians
http://www.youtube.com/watch?v=8aukC8GBEsU
The Chinese
http://www.youtube.com/watch?v=wAvRPqMQRK0
The Carthaginians
http://www.youtube.com/watch?v=sqthewMUkXg
The French
http://www.youtube.com/watch?v=iZyiPrjlAkI
The Byzantines
http://www.youtube.com/watch?v=yymXqXabqls
The Aztecs
http://www.youtube.com/watch?v=8e8ZVD0emfI
That's all, I think. Sorry if I'm making all of your free or civ time go to youtube movies, but it might give you more insight on the things in Civ. They did for me.
