One raiding guild I was in a long time ago annoyed the shit out of me. I had perfect attendence every raid, stayed till the end and never left early. But since I was relatively quiet, I basically didn't exist and would have to beg for invites to raids. Whereas the loud mouths in Vent and Guild chat would instantly get invites, even though they were total douche bags and couldn't play their class for shit, or were always late.