The praises are deserved

I have a Nikon D7000 and I have since acquired the Nikkor 16-85 goals, 35 1.8G, 70-300 VR II 10- and 24 which I am generally quite happy.
Connoisseur and owner of several DSLR (Nikon, Canon, Olympus and Pentax for weight) I acquired the 50 1.8D it based on the glowing reviews of seems he happy owners.
Since I use it, I understand less and less enthusiasm and regret not purchasing the 50 1.8G 1.4G or even 50 if one ignores the price of course, but I learned again that 'by not putting the best price is difficult has quality especially if you want shot at Nikon.
What I have against this objective:
- Poor manufacturing quality, fragility, hard to put on the case, afraid to break the (nothing to do with the quality of 1.8G 35)
- AF rough, noisy, focus tedious point works very poorly in low light, hard to find the perfect focus with a child who does not remain completely still.
Positive, the optical quality portrait on successful pictures, usually with still subjects that lend themselves to the game.
If it all over again I would take at least 50 1.8G, later, of equal quality to 35 1.8G, the price is only slightly higher.