Are there beneficial genetic mutations identified by consumer DNA genotyping?
First of all, I think it is, to a large extent, the way you perceive it. Instead of cancer-causing allele and hair-loss allele, you can think of them as cancer-protection and great-hair alleles. If you don't have disease alleles, that means that in some sense you have "life-extending" genes! Sounds much better, doesn't it?

Second of all, most funding for research is directed at disease so it is not surprising that most of the scientific knowledge is regarding this type of genetic variation.