Proudest WoW moment was actually getting my Grand Black War Mammoth, here's the story:
I had been farming VoA every week like most players at the time, and had an aspiration to start collecting some of the more harder mounts that would stand out while I did my battlegrounds. The first boss in VoA ("Archavon the Stone Watcher") we wiped to at least 15 times, and made the entire group pretty furious. Within a few minutes everyone but the main tank, a single healer, and a few other dps had stayed behind.
Being the raid leader I went back to trade, and managed to round up a pretty poor group of players in an attempt to get through a few bosses before the next Wintergrasp started. We got through Archavon in a single attempt and moved onto Emalon with little time remaining before the next Wintergrasp started. After explaining the fight a few times, and wiping, the mount dropped followed by quite a lot of spam in raid chat. Everyone rolled, but I got the highest with 96.
I don't have the SS at the time but I have one in Org I took a few months back.
https://2img.net/r/ihimizer/img696/2084/grandblackwarmammoth2.jpg
P.S. <3 Sandstone Drake.