Great topic/post!! My top 5 are:
1. Hagler vs Hearns: first fight I saw and I will never forget the electricity or excitement that surrounded that fight. To this day, I feel like it was the best fight I ever saw.
2. Evander Holyfield knocks out Mike Tyson: I'm a huge Holyfield fan and I had been dying to see this fight for years. Evander just had Tysons number, in my opinion, and he confirmed his ATG status with me on that night.
3. George Foreman knocks out Michael Moorer: one of the most historically significant fights ever. I bet big and won big on George that night, only made better by the fact that he was such a stand up guy and a favorite fighter of mine.
4. BHop stops Tito: Hop is one of my favorite fighters ever and this fight was his masterpiece. No other fighter of his generation ever matched the display of skill Bernard put on that night (defense, jab, angles, brawling, inside fighting, outside fighting, traps, countering, punching power...etc.).
5. Roy Jones Jr. Obliterates Montell Griffin: on this night Roy was scary. Most talented fighter ever, and on this night he showed the world what his potential truly was, and how superior his natural talent was to the rest of the world. I don't rank Roy high on my ATG list, but the Roy from that night could've probably beaten any fighter who ever laced up a pair of gloves.
Honorable mention: Jorge Castro come from behind stoppage of John David Jackson. Most amazing comeback and display of will/courage I've ever seen. I will never forget the crowd screaming and the sheer disbelief when a horribly beaten and swollen Castro came off the ropes to land that monster shot. Such an impressive display of punching power and BALLS!!!