For Dragonball- When Krillin fights with Bacterian at martial arts tournament.I will never forget that episode.Bacterian's most powerful weapon is his body odor!!!!lol & Krillin almos vomited.
For Dragonball Z- When Vegeta got mad when he knew that Goku will give Bulma's sexy picture & date with the old Kai.It was the first time I saw Vegeta's head gottin big.(Hmmm..jealous or somethin?)
For Dragonball GT- When I first saw Vegeta with his mustache.