I'm stretching one second lobe...
This is because...
a) I want to be a bit different 
b) I want to wear my big danglies in my first lobe piercings....
But after seeing people with their first piercings stretched I am really itching to stretch them....
So really it is just a matter of personal preference....
Left Ear: 2 20g lobes, 16g rook (healing), 16g helix (retired :'I )
Right Ear: 14g first lobe, 18g second lobe
Wants: Septum and medusa.. Star tattoo on the side of my left hand (I have to wait till I leave home)