There isn't really a right choice of lens for general use. Some prefer the image quality of primes and some like the convenience of zoom.
What you need to know is that while zooms give you the convenience of not having to change lens, they have more problems like small apertures at the long range and non-optimal performance at either the wide or tele end (not being able to focus well and losing sharpness), especially for the ultra zooms like the 18-200. Distortion is also usually more pronounced in zooms.
Primes on the other hand are going to give very good image quality but suffers from the problem of not being able to zoom. You might miss things that are happening too far or too near by the time you change lens or move to another position to shoot. You are also going to have the change lens a lot more often and thus, have more opportunities to introduce dust into your camera.
I think you should stick with the kit lens and shoot more. Only start to consider a new lens when you find limitations in it. Some people might prefer a wide angle to a telephoto (55-200), some might need an even longer focal length and go for the 70-300VR instead while some might find that they use specific focal lengths more and don't zoom much and get primes instead.
agreed!! this is the best answer!

is all depend on your shooting habit.
my next lens to buy is a prime lens....
