I was initially disappointed by the DMG. A lot of it seemed to be a bunch of amateur pyschology on how to identify what your players want and how to avoid conflicts and stuff. I just shrugged and thought to myself, "Yeah, or you could -talk- to them."
It's only useful, in my mind, for suggested XP by level tables, rules on designing your own monsters, and wherever they thought to throw in the random rules for drowning/starving/dehydration. I sincerely hope that the DMG 2 includes more hard crunchy stuff (especially more traps, and guidelines for making your own traps). So far, I've been unimpressed.