I loved the triple H vs Booker T in Huston (cant even remember what PPV that was) That was such an intense match, its probably one of my favorite triple H matches of all time.
I also remember vince v. hogan, street fight. That match had to much blood and action, it would be hard for it not to be memorable.
I think it was at Wrestlemania 19.
Another moment was at a RAW back in 99 when Vince revealed himself as the greator power then Austin becoming CEO of the WWE...all in one night. The look on Vince's face was priceless