I have a warrior. When I am playing my warrior, I am tanking. And for whatever reason, when I am playing my warrior, I am more likely to call out a player for being annoying. Whether they are unable to stay out of fire or are specced by the patented Dart Board Method™, I feel like I am grumpier when I am tanking. If I am on my druid, healing away mindlessly, I may look at gear or specs and laugh about it in Vent or guild -- but I wouldn't call the player out on it.
As an example, I recently ran a random heroic on my druid and got Halls of Stone. Getting ready for a snoozefest, I threw up Mark of the Wild and took a quick peek at the tank's gear. And that quick peek turned into a stunned moment of surprise. It's a warrior, specced into Titan's Grip. He was using a two-hander and a level 60 PvP shield. He was wearing full PvP gear, with three or four pieces of it being pally gear. He was using the aforementioned Dart Board Method™ for his spec.
And yet I just ignored it. I just kept up the DPS death knight who was effectively tanking everything. It wasn't until someone else in the group finally got tired of it and started a vote to kick that we got rid of him.
So my warrior represents my easily annoyed side. My druid is my relaxed side. My shaman is that little part of me that smiles gleefully for every Thunderstormed player that is launched off something; he is a tad sadistic. What parts of you do your characters represent? Does it make sense that they split off like that?