More on personal genomics, as Razib Khan uses himself as an example of personal decision-making based on genomic data:
It turns out that one locus determines most of the effect of this trait, and that locus has been genotyped in 23andMe. Using Promethease I ran my genotype, and it concluded I was a slow metabolizer. This has some utility in terms of when I take my medication. And it’s the first time that I can think of 23andMe giving me “actionable” information.
I like this take, from 30 Rock (http://imdb.to/sW9GS5)
Tracy Jordan: Doctor Spaceman, when they check my DNA, will they tell me what diseases I might get, or help me to remember my ATM pin code?
Dr. Leo Spaceman: Absolutely. Science is whatever we want it to be.