Well, honestly, the footage of the jungle maps dissapointed me. I was hoping to be fighting more in thick wooded areas, like in BF Vietnam, but from what I've seen it's more of a jungle type area, but the fighting goes on on the trails. That night-time map looks interesting. As for which one I'm looking forward to the most, I can't really say because I haven't played them. Although, Arica was a lot funner than Valdez.
Also, have any of you noticed that Bad Company 2's maps are a lot different from BC1? By that I mean, BC1 had a lot of great, hugh, open-field maps. BC2 tends be more strict, with some areas only giving you one little trail to push forward through. I am not happy about this change in map styles. I sure will miss Harvest Day.