Idk always skip that sht xD Same as "romantic scenes" - sht always make me cringe . But my answer is Dragon Ball Z .
"I am invinvible!, my shadow skill perfectly honed!" *martial arts language commences* Korudan style anihilation technique!" Im sorry, lol its just something about this anime intro that caught my eye. But THIS ONE this right here, hits home on my "cool list" Honorable mentions are Gundam seed destiny OP2 by high and mighty color. And the law of ueki OP2 The animes are a different story. But i rate the opening intros by style and the choice of song.