Not really how that works. While Genetics have some say in your personality and talents, your environment has FAR more say in the matter. Also, the Genes that do have say in your personality are far to integrated with each other pick and choose certain personality traits. There are multiple parts of your brain all working together to create your personality, changing one part would create unpredictable changes to other parts.
This is another myth that's holding the idea back is that we can program people's personality and world views when there is no way to even come close to doing that. The closest we could do is to personality control is cure Mental Retardation and Autism. Changing Genes would have far more impact on things like how strong your immune system is, how prone to addiction you are (read: zero prone) and eliminating genetic diseases. It would be more akin to Vaccines, except that instead of preventing diseases, they prevent genetic malformations, with a side of fixing evolution's mistakes.
And that's IF we ever get to Human Genetic Engineering. Right now, it's focused on genetic modification of crops to make plants yield more fruit per plant, grow taller, and grow fruit resistant to crop destroying diseases and pests. Imagine if we could increase the amount of food produced by an acre of farm land four times, with very little, if any, increase in cost. Imagine now that all the farm lands in America could go from yielding enough food to feed 300 million to 1.2 billion, enough to feed all of America and 81% of Africa. Now imagine first world country had this technology. World Hunger would perish, along with all the disease that follows starvation.
However, due to Sci-Fi B-Movies, every time someone brings up "Genetic Engineering" people automatically think of Half-Human Half-Fly Monsters taking over the world, or an oppressive future where everything about you down to the kind of music you like is determined by the Government or your Parents. These myths which thrive on popular culture and ignorance of the subject is what holds back what could be an amazing and world changing breakthrough. I think "Genetic Engineering" is today what "Radiation" was in the 1950's. No one understood it, but everyone saw the movies about all the monsters it causes and became afraid.