My favorite organic molecule would be estradiol. it took me a long time to figure out what molecule to go with, then I decided to go with somewthing thats part of me and also fun. Its very interesting to me that one little molecule can affect humans so much, run so much in our bodies. Estradiol is a sex hormone, one of the stronger ones in women and even men. Its responsible for the development of all our reproductive parts, mestrual cycles and even plays a key part in reproduction. So in a way this hormone gives life. It is made in the ovaries, in women and in the testes for men.
(I had to draw it in chemdoodle, take a picture then paste it) There are to OH's at both ends of the molecule