Ignoring all privacy-related concerns: Build a service to give users a personality analysis. What are their defining character traits, strengths, weaknesses, et

Ignoring all privacy-related concerns: Build a service to give users a personality analysis. What are their defining character traits, strengths, weaknesses, etc. I'm sure much of that could be read from a dataset of such proportions. I at least find it invaluable to have a good understanding of myself - so a service like that would hopefully benefit lots of other people too.