During my highschool years, I was very unhappy and suffered a mild depression, which never really went away.
Once I finished school, I started a semi-autobiographical webcomic about my depression during highschool and I ended up using a tear drop for my logo.
My avatar is a newer version of the original tear drop, which I made grey a little while ago when GOG had its redesign and everyone was greying their avatars in protest/for a giveaway which asked for it.
I'll probably put the white and blue colour version back pretty soon.