WOW. Tough question. I would say that except for m;y faith and trust in God, I trust my husband for all years we have had together (30). He has stood by me through two bouts with cancer and the loss of a child.
Trust of others was something I lost with the innocence of childhood and I have never been able to have friends as close and trustworthy since I was in college. Why? Well, you know the old saying, "food me once, shame on you; fool me twice, shame on me."
And mostly, I hate to be judged by someone who holds no understanding of who I am or what I do. I grew up constantly having to defend myself to others for decisions I made, my family (very loving, but very working class). I took me until I was 40 years old to fully accept myself for all my faults and weaknesses. I respect others and take people at face value until they give me reason not to.