I’ve spent some serious time with Halo 3, and I think it’s pretty awesome. I’m about halfway through the campaign, and so far it’s been pretty solid. Now I’ve always been more of a multiplayer guy, so that’s where I’ve been lately. I haven’t played all of the maps, but of the ones I’ve played, I think they are decent. With Halo 2, you either had a really good map or a sucktacular map. In Halo 3, all the maps seem to be just kind of average. None have really stood out for me yet.
I haven’t really spent a whole lot of time in Forge, I just made one structure of fusion coils, and that was well worth it. Overall, I think Halo 3 is a good game that improves a lot over its predecessors.