Ill second AOE the conquerers - playing bits and bobs at the moment now!
Also loved rollercoaster tycoon!
Heroes of Might and Magic (try number 3 first) is similar to the AOE type thing, but is concentrated on main heroes and building towns / armies up. Its one of those older games with very good game play, slightly medievil twist.
Resource management included - and is turn based - you only get so much movement (but unlimited building time etc) before your turn ends and the AI / opposition goes. You can speed their movements up or skip them if you dont want to watch it.