Many different jobs in aviation maintenance, if you work for an airline with lots of planes then people skills are required. If working for yourself in your own hangar doing rebuilds then you only need to get along with a very small group of people, sometimes I go two weeks and talk to 5 people in total, I rarely bother to answer the phone. So, from someone who is often told they have zero people skills, I believe it is much more important to be able to actually fix aircraft then it is to be able to talk eloquently about fixing them. Work will come to you if you are skilled.