I remember fighting diablo with around 40k dps with a shield equipped (because I'd die otherwise) on my wizard and trying to kill him over and over and over using 5 CD spells and poison hydra. 15 minute attempts Came across this song http://www .youtube.com/watch?v=W-nki7BDKzQ which helped calm my nerves and I was able to finally take him out. This was after the nerf that rendered the 4k HP w/ tons of regen build useless but before any nerfs to diablo himself were released.
Also remember when three friends and I made hardcore characters, activated old man event in field of misery and two of my friends died. Bwah haha.
The last thing I'll write about was how upset I was that they nerfed Tyreal because people where using him to kill elites or the purple mobs in Act 4 trying to find that 1k dps blue weapon!