Doomed? No. Inclined? Maybe. Whether we choose to acknowledge personality traits as inherited or not, the fact remains that they are ours to deal with. If you like how your parents ended up, then by all means feel free to live the life they tried to create for you. If not, then change yourself. The only thing we are really stuck with is the physical body. Everything else is a combination of thought, speech, and action, all three of which are completely under our control. Certain thought patterns may seem genetically ingrained, insurmountable, but will power and mental steadfastness will break us free.