Do adoption studies show that the personalities of adopted children match those of their adoptive parents?
Yes, generally the personality aspects of an individual are developed more from the environment than genetics.
I also have personal experience with this as the adoptive father of two children. This is another classic "Nurture vs. Nature" study in which the influence of physical genetic characteristics on individual personality development is compared to the environment (physical and societal) conditions.
Physical attritubutes may be considered as “raw materials” or sometimes “constraints”. But the personalities that develop – particularly early childhood – are much more shaped by the environnment and stimuli, culture and social mores than by the “starting conditions”.