I just love this game, and I love it even more when playing against other human players. Reason is because the AI is incredibly stupid and cheats a lot.
Some examples :
I spotted 2 AI triremes full of units in a 2 square lake... :blink:
They make too many suicide fights, like attacking my tank with a legion...
They are free to cancel a peace treaty by attacking one of your units WITHOUT suffering diplomatic relations with others.
2 AI civilization that I have NEVER met agreed to make an alliance war against me.
I heard that it is impossible to win in Deity difficulty.
And many, many more...
www.civfanatics.com is a great site about the Civilization series, and you can see that they say the same thing about the AI in Civ 2.