I was a lot younger and it was back in MoP i remember it clear as day still!
A blood death knight with over 1m HP pulling those huge elite snakes on the timeless isles… I tried to copy him and got killed so quickly haha I wasn’t even using key binds back then
A Death Knight drowning me in Arathi Highlands while I was doing the Under Water quests by spamming death grip & chain of ice (back then chains of ice did no damage unless you spec’d for it).
Then me making a lvl 55 Death Knight on a PvP server and drowning players in Redridge Mountains at Lake Everstill.
raiding with diel up lol
Getting behind a core hound in MC to use backstab and accidentally a$$ pulling a lava pack that wiped the entire 40 person raid… good times…
Filling out online guild applications back in BC / Wrath.
and using ventrilo lol
keeping the info in a notebook also
This was the moment I really fell in love with dks: a very close random AB match. Horde was fighting hard and it was just me and him left, as his hp plummets he tries to leap off and glider away but I yanked him back and stunned with just enough time to kill him.
It was so thoroughly satisfying. Felt like console mortal Kombat days, “get over here!”
Long long ago when WoW first came out, I made my way into the city of Stormwind, and as I walked down the causeway between the giant statues of heroes the music swelled. The chorus of voices was so powerful I had to stop and listen. It felt so utterly heroic.
Back in wrath I was apart of a guild that focused on finding secret ‘paths’ under the map and other various glitches. Would have a blast going around and sneaking into unfinished zones, discovering unfinished areas, and hidden items/easter eggs that devs left for those who managed to get under the map.
But my most memorable spot, was going to the grave of a passed friend/dev that’s in the rock tower in org… was a solemn but sweet moment.
Secrets of the Path, I love you nerds, hope you are all doing well <3
Losing a roll on T3 feet in Naxx when I was like 13. I think I cried and my guild went 2/9, so I never got another shot at them. Sad days.
A co-worker and her husband got me into WoW back when the TBC Battle Chest with Vanilla was a thing, so I bought it. Got into game, made my first character on their server, goofed around a bit. Her husband portaled me to Shatt, my little, low level self, and I just sat there in awe watching all of the high level people running and flying around on their mounts in a giant circle, lol. At that point it was the coolest thing I’d seen in the game. Will always remember that.
Sadly they don’t play anymore, but I do think of that moment any time I go back to Shatt for anything. 
Doing a wake-a-thon for charity and just playing wow instead of going to sleep afterwards, questing in strangethorn and waking up dead in Westfall as a forsaken
Gods I hope it was me
Being plastered on the ceiling during High King Maulgor back in BC. Our hunter at the time, (bless his soul he was an old 70 yr old college professor), couldnt get aggro on the shaman so his brilliant idea was to run up and smack him. well he promply died.
Shaman running lose blasting everyone around the room and when he finally got to me he launched me into the air as high king smacked me. My Tauren 
went flying and was stuck on the ceiling lol.