I felt the same way as Aku666, but as I mod more and more nations into Dom3 from Master of Magic, it is easy to see how much more complex and how deep the Dominions series really is compared to Master of Magic.
It is also worth pointing out that Dominions 3 and Master of Magic are so different, that a comparison of the two really does not do them justice.
Here are the main differences as I see them-----------------
Dominions 3 is an army building game where the goal of the player is to create varied armies of different shapes and sizes to put against the AI or other players creations.
Dominions 3's only area of advancement is magic. This magic is used to augment the armies being fielded or to make the travel of those armies easier by weakening the enemies ability to field armies.
Master of Magic on the otherhand is a game of advancement, Hero progression and to a much smaller extent than Dominions 3, army construction.
Master of Magic becomes so personal to the player because your wizard progresses in his power, as well as your heroes. In Dominions 3 a bit of this is lost, the commander leveling and Pretender progression is there, but it is alot less personal and indepth.
After working on this mod, I have really gained an appreciation of just how different these two games really are, although they did not seem it to me when I first started working on the project.
Therefore, Dominions3 is my favorite strategy/army building game of all time, and Master of Magic is my favorite strategy/Hero/wizard development game of all time