I'm using D90 and happy with 50mm 1.8D. Only find it too tight at times. 35mm will be better for crop bodies. This is my feel. YOu can try with your kits lens with the maximum zoom. I get bokeh with max zoom on my 18-105mm too.
All lens have some degree of blur when taken at big aperture, it is only if you like that quality of blur.
For example with your current kit lens, at 55mm should a subject at f/5.6 and make sure the background is very far like > 50m from that subject. And you will get bokeh butyou have to determine if you like that bokeh.
If you like creamy bokeh, then 85mm f/1.4D (no G for me to test) are known for that. The best bokeh I have seen so far are on 200mm f/2.0 VR1or2 but this is my preference.