Science Catches Up
Here is the index to this long series on Astrology Just For Writers.
Here is the specific blog entry I did in 2009 about how a writer can study an audience, choose an audience, and target that audience by depicting the Characters in a "realistic" way.
When you use Astrology to build a Character, people understand that Character and their "life" and motives non-verbally. You don't have to "believe" astrology (I recommend that you don't), but you can use it in a way nobody would notice, to achieve powerful results.
Here is an item that turned up in March, 2016, pinpointing the millenial generation as narcisistic.
This is the beginning of asking the right questions of people, but asking for subjective evaluations is a bare beginning. Objective measurements must follow. It will be fascinating.
Note, in Astrology Just For Writers Part 6, the list of where Pluto (in Scorpio) and Neptune (in Sagittarius) were in 1985 which is way down inside my post. Pluto and Neptune (along with Uranus and Saturn) frame the life experiences impacting character development.
What you seem to be on the outside is not what you actually are on the inside. You see and evaluate others through the filter of what you are inside (Sun, Moon), and what you seem to be on the outside (Ascendant).
Read this blog series on Astrology Just For Writers to see what you can learn about your current target audience, and about how to depict a Character born in those years.