You raid with these people. You work with these people. These people are closer than your family. You should worry.
The GM- He’s sacrificed his health, friends, and probably a couple of jobs to drag you through new content. When the guild isn’t performing, these decisions are in question. Prone to shooting sprees, forum flame wars, and the rapid advancement/gearing of whatever toon the guild “needs”. If you can keep your mouth shut, he’ll go emo and quit before you get gkicked. Still, you do like the guy. Or did. Before he went crazy. See drunks, below.
The GM's Significant Other- Okay, so he was going to have to quit but he tricked his SO into playing. She loves it. She's terrible. You'll effectively 24 man every boss. Count on 4 constructs in the raid, every attempt. She plays a Belf.
The Raid Leader- When you stand in the flames, he dies a little bit inside.