Nikkor 35mm 1.8 lens?

I'm planning to buy a good lens that has a good sharpness, bokeh, for portrait, landscape, good for low light situation. Do you think 35mm 1.8 is a good choice?

Can someone suggest me a good lens for me.

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You won't get all of that in one lens - portraits call for telephoto lenses, landscape for wide angle. Those are exact opposites. The closest you could get to this would in a single lens would be a f/2.8 standard zoom (such as the Nikkor 17-55mm/2.8 or the Tamron 17-50/2.8), but that's still far from the portrait usability and low light capability of a nice, fast prime lens.

The 35mm/1.8 is in my bag, but it's one of the lenses that i use the least. While its focal length is known as the standard "walkaround" one, i've found it to be as much of a compromise in terms of focal length as many zooms are on image quality or speed. It's too long for most landscape applications, too short for single person portraits.

I'd get a 50mm prime over it any day - perfect for portraits and only a bit less useful for landscape shots than a 35mm one.

Get the 50mm/1.8G or 50mm/1.4G if you have a camera without autofocus motor. If you have one with AF motor, you can also consider the cheaper 50mm/1.8D.

No. Yes it has good sharpness and decent bokeh. 35mm doesn't work all that well for landscape and it's too wideangle for portraits which will lead to distortion.

Knowing what camera you shoot would help. I prefer at least 50mm for portraits and for landscapes my upper limit is about 24mm.

On a 35mm film camera or full-frame DSLR a 50mm lens is considered a "normal" lens since its angle of view approximates that of the human eye. On a 1.5x "cropped sensor" DSLR a 35mm lens will have the same angle of view as a 52.5mm lens would on a 35mm film camera or full-frame DSLR. So on a "cropped sensor" DSLR the 35mm lens would be a "normal" lens.

On a 35mm film camera or full-frame DSLR a focal length of between 85mm to 105mm is considered an ideal focal length for portraits. With a 1.5x "crop factor" a 50mm lens will have the same angle of view as a 75mm lens would on a 35mm film camera or full-frame DSLR - making the 50mm lens a good choice for portraits.

The 35mm lens is not a good choice for landscapes on a "cropped sensor" DSLR - it just isn't wide enough. The 18mm end of your 18-55mm or 18-105mm lens is a better choice for landscapes. The Nikkor AF-S 10-24mm lens would be an excellent choice if your budget allows.

Here is a comparison of a 24mm lens on a 35mm film camera and its equivalent focal length which is 36mm on a 1.5x "cropped sensor" DSLR. My camera was on my tripod and the camera position never changed. Since there's no 36mm lens I used a 35mm lens.

24mm: Note how much of the foreground is in the picture, the apparent distance to the trees in the background and the newly-planted sapling at the right of the frame.

35mm: Note the loss of the foreground, how much closer the trees in the background appear and that the sapling on the right has disappeared.

For portraits I suggest the new Nikkor AF-S 50mm f1.8 lens.

For landscapes use the 18mm end of your kit lens with your camera on a tripod. Shoot in Aperture Priority. At f16 and focused on a subject at 5'-0'' your 18mm lens will give you everything from 2'-0'' in front of your camera to infinity in focus. You can learn about Depth of Field (DOF) at these sites:

http://www.dofmaster.com/dofjs.html
http://www.kamerasimulator.se/eng/?page_id=2
http://www.illustratedphotography.com/photography-tips/basic
http://www.digital-photography-school.com
http://www.photonhead.com