First is voice quality. Better rappers can actually carry a tune usually. Very distinctive voices also carry weight.
Rythm is critical. Hip Hop is essentially "beats". Voice as instrument: Rap is moreso percussion.
Emoting. Good rappers are actors on the mic. They convey emotion.
Bars are actually less important than I like. Ill enough bars can overcome some flaws, but usually dope writers end up writing for rappers that have the above qualities.
That's my $0.02. Add on.
Rythm is critical. Hip Hop is essentially "beats". Voice as instrument: Rap is moreso percussion.
Emoting. Good rappers are actors on the mic. They convey emotion.
Bars are actually less important than I like. Ill enough bars can overcome some flaws, but usually dope writers end up writing for rappers that have the above qualities.
That's my $0.02. Add on.