Current shortlist is:
Civ 5 and perhaps 4 or another more recent Civ game.
Command and Conquer 3
Red alert 3
Command and Conquer 4 I didn't know I was missing so many!
Thanks guys for helping me find something new
Got to check out some of the more recent suggestions. I don't really want games from early 2000's though because chances are I looked at them back then and put them down but I'll make sure first