The original Borderlands was apparently successful enough to warrant a sequel, and it sounds as though Gearbox is taking the effort to make Borderlands 2 a worthy sequel, and not just a "re-hash everything and put it in a new box" kind of affair. They're talking about learning from the original game, strengthening and expanding the game's core elements, while getting rid of or revamping the other aspects.
The first game was very entertaining, bringing me back for hundreds of hours hunting for better weapons and trying out new classes. But it felt really shallow and repetitive at times. So in light of my experiences with the original, and with what Gearbox is saying about the sequel, here are the sorts of things I'd like to see in Borderlands 2.