I bought the 28mm for my D5100 and it is my favourite lens (I have the 50 1.4, 85 1.8, 18-55, 55-300, 16-35 4)
Here follows my Account:
Why I decided to Purchase
I want to make the transition to Full Frame but decided to put off buying the camera as late as possible since I am a true believer in buying the glass first. Why Full Frame? In short because I want to make the most of my glass in the sense of using the lenses at their prescribed focal lengths. I love 28mm and 50mm equivalents and could do all my street stuff with just those focal lengths. With DX, there is not suitable fast 28 equiv and the 35 1.8 is not great wide which I may need in super low light. Additionally, the 85 is a gorgeous portrait lens but is too long on a crop. In summary, I am going full frame to be able to use the focal lengths of the lenses you listed: 28, 50, 85 and I like these particular lenses because they are sharp (ish)
So why the 28mm, the focal length
As I mentioned, I love this focal length for street. You can get in really close to people and still show so much of the environment (low compression). I am not able to use its full potential just yet since I still have a crop but I know once I make the jump the lens will fit into my bag. I currently use the V1 with the 27 equiv (my other lens of choice is no surprise the 50 equiv) and so I feel comfortable with this focal length. Additionally, at present the 28 serves as a 42 2.7 which is great for shooting indoors. I found the 50 on a crop too long for that since I like getting in close.
Why the Nikon 28mm F1.8 G
So I bought the 16-35 F4 VR to suit my 28mm focal length need when I eventually made the FF upgrade. Additionally, this lens would allow me to get landscapes which I enjoy from time to time. However, in low light, the lens was just not fast enough. Added to that it is a big lens. Now I am not a believer in the whole gear to heavy story because I have gotten used to hiking in Africa with loads of gear and I would rather sacrifice the comfort for the quality and the increased probability of getting the shot. However, I know it is important to some people so I will say that the 28mm is a light dream to shoot with. Put it on a smaller camera and it all just balances. For me, the problem with the 16-35 weight and size is that it required a battery grip to balance everything out. Add this all together and you have a far from discreet camera. Not such a concern, it just means I have to get the shot on my first attempt and be really fast.
Going back to the 28mm, it is light and 2 1/3 stops faster. I prefer to have more DOF but this is not a worry since you get substantial DOF even when using this lens wide open on a crop. But in low light, if you shoot street or anything that moves, those extra stops are vital. I tend to shoot it at low light at F2 since it is quite a bit sharper and it makes calculating stops and metering easier for me.
Lens Impression
I have been blown away by this lens.
Focus Speed - Surprisingly brilliant, which is unexpected on a wide lens. If anything a bonus. This is imperative for street.
Image quality - Again, relatively sharp (it even competes with the 24 which I tried and is only marginally better at F2 and the same by 2.8 ish)
Build - Great big focus ring! I love it and I will admit that since lighter, I tend to have my camera raise and ready more often than not
Why I think you should look into this lens
- Primes make you use your feet and from experience, this prevents you from getting lazy and forces you to compose on the spot
- Primes are lighter and faster as you know
- The lens is good value for money since it performs similarly to the 24mm, a 2400 dollar lens
- The focal length is great an complements the 50 and 85 on FF.
- On a crop, 42 is really close to your eye and great for intimate portraits where you want to get close
- Only by FX glass so if you ever consider going to FF, you don't have that barrier
- Many more reasons I can't think of
I would love to share a stack of street shots I did with this lens but alas I have left my hard drive in Sydney and am now in Africa for 3 months. However, I have one to share with you for now and if you want more info or photos when I have gone wondering here, then reply here or message me.
I'm sorry for this muddled account of the lens. My mind has been elsewhere and today is not a good day for South Africa. I hope you pursue this lens since it is a real gem and an underrated tool.

28mm, ISO2000, f2, 1/160 on a D5100