I'm the same.
I started out with the Nikon 18-200VR and, like Nate, absolutely adore it. Not super-fast, not super-sharp, but very reliable and covers pretty much everything I could possibly want to shoot. I recently added a Nikon 50mm f/1.8 which is a no-brainer; excellent performance, very inexpensive and it forces me to improve my technique.
Aside from perhaps a macro or wide-angle lens, I doubt I'll ever need anything else in my kit. Well, that is what my wallet and partner are telling me anyway