I used to think the theme tune was the musical definition of hardcore bad assery. I remember watching it on Cartoon Network and feeling awesome. Playing it was pretty cool too, my Draceil (spelling?) broke this kids' Beyblade at someone's birthday party and I didn't even feel bad. It got banned in my school though after people started using them as weapons, launching them into people's eyes and stuff.
Holy shit man the entire soundtrack on that show was -blam!-ing brilliant. I rewathced the entire series online and I had tears of nostalgia in my eyes.
It's pretty cool, but nothing beats that "F.UCK YEAH!" feeling of the theme tune. I'm also nostalgia-ing pretty hard right now, watching this and playing Pokémon Ruby was my childhood.