I was wondering, in your opinion what is the most primary secondary fight in DBZ.

Primary fights are between Goku and Vegeta, Goku and Frieza, Goku and Cell, Gohan and Cell, Goku and Kid Buu.

Some examples of secondary fights are Vegeta and Zarbon, Piccolo and Android 17, Semi-Perfect Cell and ASSJ Vegeta, Mystic Gohan and Super Buu, Vegeta and Kid Buu.