Looking for a RTS

[ash12181987]

The stronghold series mentioned by a few other people, would be my biggest recommendation.

If your looking for something that is more city building than combat though, I'd recommend Children of the Nile and CivCity Rome, fun titles both of them. Oh, and I've always had a soft spot in my heart for 1404 AD, 1503, 1602, 1701, etc. 1602 and 1503 being the two I favor.