That is really good for a quick sketch, I like it! 
I am the Blaster, I have filled the role of Tank, Controller and Defender
Sometimes all at once.
Union EU player! Pip pip, tally ho, top hats and tea etc etc
Wow. Super sketch there!
For a quick sketch its very good, you could start a "drawn in under a minute" type theme but we'd never be able to referee it.
He will honor his words; he will definitely carry out his actions. What he promises he will fulfill. He does not care about his bodily self, putting his life and death aside to come forward for another's troubled besiegement. He does not boast about his ability, or shamelessly extol his own virtues. - Sima Qian.
This Picture
is something i quickly drew just to see if people would like it, didnt take long 5-10mins.