A common question is "what lens should I get".. "Well that depends"
I found something that I want to share that I think will help some people on where to start.
A bit of info first. I have a Nikon D7000 with two lenses.. the 16-85 DX and the 70-300.. so I pretty much have full coverage from 16-300mm. What I want is some fast glass where I tend to take the majority of my pictures..
I use LR3 for my basic photo organization and most minor tweaking. I found an awesome plugin for LR3 that plots info from your pictures.. For example if I want to know what lens to get next.. perhaps it might be helpful to know what your shooting habits are currently. This plugin http://regex.info/blog/lightroom-goodies/data-plot does that and more. Here is it plotting the focal length of all the approximately 30,000 pictures I have taken.This tells me that 48% of my pictures are taken between 16-23mm. I know I love shooting landscapes.. and this solidifies that my tendencies are to shoot with a wide angle.. so perhaps a fast lens around 10-16mm might be a great choice.
The counter argument might be.. well why do I not shot as much at the other focal lengths? perhaps it's because my glass is not fast enough . I have spent the last six months or so trying to pick my next lens.. and my personality keeps me second guessing my choices.. but perhaps this may help someone.
-Devoh