Noz's lists usually aren't based around singles all the time, just what he's looking for specifically in rap from certain people. So For example, I know one year he had "Gucci Gucci" by Kreayshawn on it the same year he had DJ Quik "Ghetto Rendezvous" and E-40 "My Little Grimey N***A" which aren't great singles by any means, but kind of good showcases for the rapper at what he considers their best (in Quik's case, incredibly petty battle raps aimed at members of his family or former friends and in E-40's case, weird ultraspecific detailed 'panoramic' storytelling, though without a clear beginning/end structure like say a "Children's Story".)
I've done lists kind of like that too, and its weird to rate one thing over another, but like when I think about it I'm rating "is this beat interesting, is there something going on lyrically, is there a unique quality to the song I don't find very common" So like, Rich Homie Quan making a song about dealing with his father being shot is def. that characteristic, but Famous Dex rapping about being the man isn't. Doesn't mean that the former's the better single either!
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Edit: also if I'm out here alluding to lists, I should link them.