What lens to get after 18-55?

I've got a Nikon D3000 that came with the standard lens. I think I'm ready to get new lens. What do you suggest? Nikkor 55-200mm or should I try Tamron or Sigma?

I suggest the AF-S 55-300 mm if you wish to shoot sports, action or wildlife, the AF-S 10-24 mm if landscapes is your interest

Depends on you interest.
If you want a zoom 70-300. Sigmas 70-300 vary good quilaty also has a macro fanction.

Portrats 50 f1.8. Good starting lens.

You need to ask yourself the basic question "What do I need the lens to do that this one can't?" Until you can answer that question, it is hard to recommend a specific lens.

The advice I always give is to buy the best AND fastest glass you can afford. A nice lens, like a nice tripod, when properly cared for will outlast you and the future camera body upgrades that you do. The best thing to do is work with the "kit" lenses until you can understand what "need" that lens is not providing, such as better in low light; sharper focus; less chromatic aberration; etcetera.

I have have issues with the different Tamron lenses I owned in the past, such as zoom/focus slipping/sticking and slow focusing. If I can't afford the manufacturers lenses, then I would choose Sigma over Tamron (but that is just my opinion).

Remember… The smaller the f/stop number, the "faster it is by allowing more light into the camera. That will allow you to use a lower ISO. "Fast" lenses start at f/2.8. Over the years, I have upgraded my lens collection to f/2.8 and faster.