I hate zoom lenses, partly because of the optical compromises implicit in zooming, and partly because they introduce an unnecessary variable in composition. But most DSLRs seem to come with zoom lenses only. I’ve been using an old 50mm lens on my D200 and it’s worked very well but because of the fudge factor (1.5) needed to allow for the difference between the size of the sensor compared with 35mm film, it winds up being the equivalent of a focal length of 75mm. So the other day, courtesy of ffordes, I found a good used 28mm f2.8 Nikkor (which is the equivalent of about 42mm) and it’s just perfect.