I am using D90 with 18 -200mm kit and just added 35mm f/1.8 to my collection. For the 35mm f/1.8, picture is very sharp, I Love it. Got it for $350.
Thats good for you. At the end of the day, you have to factor in personal preference. Some like the 35mm, some prefer the 50mm, while some would die for the 85mm.
Different folks, different strokes.
