I'm positive my dad's ISTJ. I made my brother take the test and wala, ISTJ too. I have a hard time seeing my mom as the same type as me but perhaps that's because of her uhm parenting but she may be INFJ like me. A family of introverts we are. A little freaky. I may become very attracted to ISTJs as they seem very reliable and sturdy and then we'll breed ISTJ and INFJ children. Oh goody.