I've had a chance to read current affairs on screaming.
I listen to maybe five bands with screaming... The rest of my music uses a serious of growls and grunts, which I personally think sounds better.
Screams are common in nu/brutal/some black/heavy and power.

SBM uses a lot of "death noises" with sometimes include screams. They create the appearence that they're dying or being ripped to shreds. I listen in sometimes. The atmoshperic music afterward is worth it.

Grunting/growling > screaming.

I guess if you planned to scream for a long time, you might need some form of voice training.