There seems to be a type who attracts a lot of offers of help
Whether it's volunteers shopping, friends who do practical stuff for you etc.
MN is full of posters saying "I do this for someone and I don't know how to stop".
How do people attract those willing to PA and run errands etc? What am I missing and where do people find these friends?
I'm always happy to help people in need but some people seem to attract them. I mostly attract people who like to talk about their problems and think I have a "kind" face. 
What am I doing wrong? I don't want to be the person the random drunk on the train chats to, I want to be the person who gets a msg saying "I'm popping to the shops, do you want anything?"