Endgame raiding, for those of you who don't know, can get a little predictable at times. Each class has their pre-defined roles, and each has their own unique style to them. Each raider usually carries with him or her (possibly ill) conceived notions of what players of each class are like.
For instance in my guild we usually poke fun at our Mages as being "emo mages," since they like to die a lot. Another one has lately been that I AFK tank, since when I get above 50k threat on the top DPS, there's very little chance they'll catch up to me (and on that note, they joke is on them, because as the main tank I often times do go AFK during phase two of Illidan.)
Take a look at this moderately funny YTMND take on WoW Endgame raiding. And have your volume up a little, because as my girlfriend explained, "That's Little Spanish Flea! You know, Homer sings that all the time."