Who uses 0.5, they break too much!

War? The only mechanical pencils I got going to school were ones I found that other people had dropped. You didn't get to choose the size of the lead, you got dealt that hand randomly and could only hope that if you found lead it fit your pencil.

0.5 broke more easily, but at least it wouldn't coat your writing in excess graphite and absurdly thick lines.

0.3 is the real contender

Ooooh. It was intense.
Nobody knows this, but I used to use both of them.

I still have a 0.5. Beat it losers.

Me, a psychopath: 0.9

0.7 all the way