Markus Persson

He is the one who made Minecraft.

Going by the name of Markus Persson, he started development on Minecraft around the 10th of May 2009.

-He lives somewhere in Stockholm in Sweden. Notch is 30.

-He enjoys taking long vacations every other week in order to get out of working on Minecraft.

-He is engaged to his fiancé, Elin aka "ez"

-He is SCUBA certified

Known Information
Notch seems to be large and have an awesome beard, this makes him a pure geek.

I’m the large guy with the full beard. http://notch.tumblr.com/post/139018766/illness-update-and-meeting-of-the-minds

It is also known that Notches real name is Markus Alexej Persson and probably lives in Sollentuna/Stockholm in Sweden.

Notch is a wimp
<@Notch> i once lost a fist fight. The other guy wasn't aware of it, though.