I've heard several people here mention getting genotyped by 23andme (I assume there are other companies as well). Does genotyping have significant practical benefits or is it mostly for curiosity's sake? If there are significant benefits, what are they?
I think it's mostly for curiosity's sake, barring rare genetic disorders. I mean, I would like to learn my genotyping so I could check it against various SNPs linked with modafinil and nicotine, but I wouldn't pay $100 for this given the apparent weakness of the links.