Just got mine today.
With a very shallow depth of field of this lens, it certainly takes a little getting used to, initially. The first set of test shots went all over the shop and its definitely not about the lens or the Nikon D90, I realized. But rather, its about the need to switch to a more concerted focus mode - Single Point (Menu item A1). That's when everything begin to fall in place. Picture softness will occurs if you expect sharp images off-the-shelf. Doesn't happen. Note to also switch to AF-C AF mode to attain focus lock on moving subjects. Yes, it does not come equipped with Silent Wave Motor like our kit lens - Nikkor 18-105mm VR, but its nimbleness in obtaining focus on the subject is commendable.
The 2002-Introduced Nikkor 50mm F/1.8D is one of the top-notch (yet so affordable) range of portrait lens made by Nikon. Its also quite fine if the "MADE IN CHINA" is a major concern as all Nikon 50mm lens have all along been manufactured there. With the $100 price tag, image quality is still stunning. Historically, The optical designs used in 50mm lenses were perfected about a bazillion years ago so you know they‘re sharp.
In P mode of the Nikon D90 Creative Dial, you need to ensure the Aperture lock is set at F/22. Some people are quite disturbed about the slight diaphragm movement when you shake the lens but its pretty alright with me in that department.
Enough said, lets start learning to shoot like Cartier Bresson!