One of my main memories from that period was dying. Dying a lot. I don't know now whether I'd have the skill to do the Ironman Challenge, but I sure didn't then, and things killed me constantly. I didn't understand about aggro linking, where if you taunt one mob, any mob near to it will be taunted too, and I wasn't great at using my abilities. I was holy, to improve the healing, and I didn't have the early damaging skills pallies get now.
This made me angry. So whenever I see Hogger, who must have killed me 20 or 30 times, I take my revenge. It's harder now that he's down in the Stockades, but when I went down there to take the screenshot in the header and killed him, I still thought "Ha!"
And murlocs -- they're high on my grudge list. My God, they killed me a lot. If I encounter a gang of murlocs while I'm out herbing, I'm sorry. They're going down.
I mentioned monsters from the Alliance side, as I really don't know what the Horde equivalent of Hogger and murlocs would be. Do let me know! I'll go and kill them for you.
Should I seek professional help? Do you hold irrational grudges against mobs or bosses that killed you over and over again? And if you do, who or what are they?