I can't stand speaking on the phone
Regardless of how familiar the person is, I despise talking on the phone to anyone. The only exception is immediate family members, but even then I don't like it much.
Something about the fact that you can't see the person you're talking to, but don't have the time to consider your responses like you do via text, makes phone conversations the worst of both worlds for me.
I avoid it whenever possible, and really don't understand people who enjoy talking on the phone and can go on for ages. To me it always felt a bit like being held hostage.