I'm sure if you ask 100 different people you will get 100 different answers... And of course I have a different opinion from the others. I think you main problem looks to be wire speed too fast. Turn the speed down to about 3.5 and see how it does.
I am 100% self-taught meaning I'm no expert... but my junk doesn't seem to break so I guess that is a good sign. One major tip I would offer is to only change one setting at a time.
Check out the attached pictures and my corresponding comments:
Red: Wire speed too way too high.
Green: Looks like good penetration.
Blue: Too cold or moving to fast causing the bead to MOUND instead of burn in.
Edited by twostep, January 21, 2014 - 11:05 AM.