So let's asume you're in a bg and you see a certain class coming at you. What goes through your mind at that moment ?
I play an unholy dk so...
Warrior: Did this guy just charge at me ? Is he serious ? Go tackle a critter, gimp.
Mage(frost, seeing icebarrier): Nightwish-The End of All Hope, starts playing in my head.
Mage(arcane/fire, seeing mana shield): Oh, cookies!
Ret paladin: Finally, some fun.
Rogue(unstealthed, I get the jump): Bitchslap, bitchslap, bitchslap
Rogue(stealthed, he gets the jump): Is this guy for real ? Wait...did he just crit me for 6k...and another 6k...wtf, I'm disarmed...DEAD.
Resto druid, shaman, holy paladin, disc priest: sigh, ok, let's do this and at least I'll just keep you busy until I get zerged by your mates or mine zerg you.
Hunter: I'll see your worth if you disengage before I used deathgrip...and here he goes flying away...GET OVER HERE!
Feral druid: Hmm...this could get ugly but odds are I'll win anyway.
Warlock: He could beat me if he has some skill and is affliction.