I needed a big, loud, but still controled crash/ride to supplement my other cymbals, I play noisy rock/punk and needed this to fill the space with noise for big choruses and breakdowns. I've used 21" crash/rides from other prominent manufacturers, but sometimes they're "too noisy" or abrasive, and sound engineers are begging me to stick tape on them.
The Paiste 21" 2002 Black Big Beat Cymbal doesn't have this issue thanks to the dark finish which allows it to sit in the mix better.