A lot of the heavys I followed in the 80s and 90s...my 'big three' of Lewis, Holyfield and Tyson of course. Then also guys like Bruno, Tua, Grant, Morrison and Moorer.
Kostya Tszyu-it's hard watching your idol get mauled; especially when it's a guy like Kostya. I literally shed some tears I think. Vassiliy Jirov-I nearly threw my TV out the window when Moorer caught him.