I liked a few Real-time strategy games, some of which include:
Age of Empires III ---> which has a few good points ---> innovative "home city" system creates long-term depth and strategy & plenty of content and modes of play
Warcraft III: The Frozen Throne
Rise of Nations: Rise of Legends ---> which has a few good points ---> very similar to Rise of Nations, interesting, offbeat races and units & great art design.
There is more that I played, but the Mr. is calling for me to be in bed, so I'll post some more tomorrow!