Ultimate Warrior vs Honky Tonk Man, Summerslam 88 - Nuff said.
The Giant vs Randy Savage, Road Wild 97 - It's fun seeing Savage get squash after being an asshole heel for like 5 months.
Sting vs Hollywood Hogan, Starcade 97 - Yah overbooked, shitty, etc. but still a damn good moment to see Hogan finally lose.
Eric Bischoff vs Ric Flair, Dec.28/98 - Bischoff gets his ass kicked and the Horsemen destroy the entire nWo. How sweet it is to see WCW finally win the war(too bad the next week it ended with a fingerpoke).
And finally,
Hulk Hogan vs Kevin Nash, Jan.4/99 - Sue me, I found the fingerpoke of doom funny.