It is an interesting thread and I guess inevitably such question will always pop up every now and then.
When I 1st started a year back, I was only looking for tele zoom that can help me shoot as far as possible. I didn't understand anything about VR or the difference of f1.8 or 3.5.
Even as I learn of the aperture, speed and ISO, I always forget to make those adjustments till it is too late. So do excuse newbies that keep asking the same questions since that seems the obvious way to learn beside taking a former course.
If one is totally new, they don't even know where to search or even if he is reading the thread, may not totally understand all the jargons. A little help from seniors here goes a long way. I have benefited from forums such as CS and others over the past 1 year.
Az of today, my wish list lens would be a 11-108 mm f1.8 lens on my DX camera. Now I live with 17-50 f2.8 and 70-300 f4.5-5.6. However, I like my AFD 50 f1.8 too.
Cheers