Actually we choose everything with help from teachers and guides. I am now woking on my next incarnation. If we put intent and will into our thoughts, that can effectively set up the parameters for our next life experience. I have been told by my spiritual teacher that I can and will be a surgeon in my next incarnation. However, in order to be certain, I must now begin putting the proper aspects in order. What it is I want to occur. Whether I'll be married (yes to my current wife as she has chosen to do it again) We will both be doctors. She a psychologist. She currently is helping people in a new web based program.
http://dragonofdrama.com/ Understanding the nature of personal reality.
Anyway, it's all about planning, setting up signposts, aligning people, parents, friends and family.