If we're talkin' live and not VHS, then "Wrestlemaina XVI".
Yeah completely live, otherwise my first event would have been like 4 years prior to WMX on VHS from Blockbuster Video (They used to have sooo many back in the day).
Wrestlemania 2000 I remember really enjoying at the time, I've never gone back and rewatched it but I know a lot of people knock it.