Overwatch: Who's Your Favorite Support Character?

Hello everyone. I am noob in Overwatch, It is more funny than my expect. I love this game and many masters. It is very great, I have to play it some hours a day after got it from scdkey. Let us make a poll

I love Symmetra on defense, she's a more dangerous character than one could think, and her teleporter is one of those "win or lose" game changers.
My second choice would be Mercy when the team really needs a healer.

What about your idea ? Which one