Ive been playing this game for years (Dom, DomII, Dom3) and I can never quite delete it from my machines. I get a new machine, I consider not loading this, I try it just for a second and I'm sucked back into it for months and months. It is well worth the money. Just figuring out how to properly play each nation made this game last MUCH longer on my computer than other (prettier) games of the same price. And when you get that figured out then there is the multiplayer games which have at LEAST that many versions in game setup or conditions for you to muddle though.
I love that there is no perfect way to win. Even the developers didn't have one for everyone to figure out. But there are hundreds of fun and creative ways to lose.
I also like the RPG thing. It takes getting used to being just the god-guy giving instructions which don't always get done the way you wanted. You aren't controlling each piece for each step. But the RPG conversations in my head are great when I chew them out.
And I am STILL not feeling a need to dip into all of the wonderful MODs people did to add MORE nations and stuff. So I know that this isn't going to get deleted for a long time to come still.