I always hated how they called it Wrestlemania 2000 instead of just Wrestlemania XVI. Replacing the roman numerals with the generic 2000 logo was lame.
The event itself wasn't really memorable outside of the TLC match between The Dudleyz/Hardyz/Edge and Christian (although they didn't start calling matches between these three 'TLC matches' until Summerslam later in the year, but that's what it was) and the main event, the latter of which was only memorable because it was the first time in Wrestlemania history that the show ended with a heel victorious, but there's definitely been worse Wrestlemanias. 2, 4, 11, 12, 27, 29, etc. If it weren't for the I Quit match and the Chicago Street Fight, I'd name 13 as well.
A lot of people to this day still criticize the decision to have the heel (Triple H) go over in the main event, but I thought it was brilliant. It made the encounter between The Rock and HHH the following month at Backlash all the more anticipated (and may I just say that the booking of the Backlash 2000 main event is undoubtedly some of the best booking in WWE history.) The grievance on the part of the Rock marks though is that The Great One never got the moment that guys like Hogan, Warrior, Savage, Bret, Michaels, Austin, HHH, Undertaker, Cena, Batista, Bryan all received, which was getting to end Wrestlemania victorious while holding up the WWE Championship. WM16 would have been the perfect place for it.