A balance of flow, lyrics, story telling, delivery and knowing how to structure it all

If I like it it's good rapping

Die Today by young thugger

But there are like 2-3 other iterations of what “perfect rapping” looks like

Charisma

Such a good answer

good mic presence, delivery, flows, ability to craft lines/verses that effectively convey the message that you want to convey, creativity, wittiness, etc