How come that me and my brother are totally different despite having the same parents? My brother is tall, has brown skin, overweight, is conservative, curly hair, extroverted and works in finance while I am of average height, pale, underweight, have straight hair, liberal, work as a musician and am introverted?

We both are our parents kids, we actually were tested, so it's not that. Is it just recessive genes and nurture?