I am very stingy with my comms, personally. I will give my comm to whomever actually impresses me with their skill at the game. When I do hand them out, I make it a point to let them know personally how impressed I was with their gameplay. Maybe they adapted to an unexpected situation incredibly well, or maybe they outperform everyone else in the party in some other way. I only hand out comms to people that demonstrate brilliance in some form or another, be they DPS, Healer, or Tank, but they usually must be exceptional. I don't take into account peoples' manners or comments throughout the duty. You could be the biggest cunt in the world, or the nicest angel, it wouldn't make a difference to me. In the end, efficiency and skill are all that matter to me.