If I were to pick three things I am thankful for...
I am thankful for my family. My parents, siblings, husband, children, and extended family give me both joy and headaches, but without them, my life wouldn't be as colorful.
I am thankful for education for without it I wouldn't be doing what I love.
I am thankful for the interests of others. My life would be very different if my surgeon only kind-of enjoyed what he was learning in medical school.