[Trumanator]

Well, for favorite games overall I would go

Company of Heroes
Oblivion
Battlefield 1942
AoE 2
Total War games

As far as games you could actually use for a Dominions mod...

Warlords Battlecry 3
Warcraft 3
Age of Wonders
Total Annihilation: Kingdoms
LOTR Battle for Middle Earth

Edit: Oh, and I'll throw in Kohan 2 also