Just listening to "You're Never Over", and Recovery again since a while and when he said "tryna process this loss is making me nauseous " it got me thinking how Em often focuses on making lyrics sound pleasing to the ear.
In that line he's emphasizing the letter 's' with the words he's chosen, which make that line sound very pleasurable, to me at least.
And obviously he's not the only one to do things like this, but he's a lot more consistent and persistent with it and he's done things like this throughout his career. I think this is another reason he's so huge (very little has to do with him being white, sick of hearing that) - because he not only focuses on making subject-matter meaty (I'm speaking of him in his prime) but he also focuses on making it infectious and pleasurable for the listener.
Where as a lot of rappers, even good rappers, just focus on writing good lyrics and flowing well and don't have the same obsessive detail or concern for minor, studied payoffs.
Which brings up another point, with Em he's always focusing on what the listener is thinking, with every line. I know other rappers do, but again, it's just the extremity and level of care which differentiates it. He wants you to hear and get something out of second. Where as a lot just fill up space.
Pretty pointless thread, just had that thought. Another reason his best work is like crack.