I don't like physical contact as a general rule of thumb. I will give my family members a hug if it's night time or if they are going away or something, but I find any other physical contact at other times to be very difficult and uncomfortable.

I'm not a fan of physical contact in general, but I do find it easier with people I don't know at all in some ways, I don't know why. On the flip side though, if I'm in a relationship with somebody (which doesn't happen often, or for long when it does) I really enjoy physical contact with them.

Hand shakes confuse me, I never know if people want/need a handshake or not.