I hate a ringing phone. It irritates me to no end. A silenced phone that vibrates is just as bad. If it is a number I don't know I won't answer it and if it is a family or friend calling I'll only answer sometimes. It's not that I don't like talking. Heck I was given the nickname Motor-mouth as a child but I prefer talking on my terms and I don't answer the phone when I'm really anxious unless the call will help with my anxiety like when someone has been gone longer than it should have taken them to do what they went out to do.
I don't like people coming over unannounced. And my parents have even given me a lecture about being hospitable when people come over and I'm not feeling up to snuff. I can't answer the door if it is someone I don't know. I don't know them. I don't know what they will do. And when the kids answer the door or invite someone in that I don't know or expect it can sometimes make me feel both angry and terrified at the same time.
So all in all, I don't like to answer phones or doors.