Not just emotional, but "serious" as well. Every time I go on a random rapper's YouTube page, their "emotional" songs are usually the ones getting all the attention.
This isn't the late 90's-early 2000's anymore. Rap isn't all about being emotional and serious anymore, artists are constantly evolving past that.
Just because a rapper is talking about how his mom passed away or his drug addictions, doesn't make him a good rapper, AT ALL. It doesn't make him poetic, it doesn't make him a good lyricist, it doesn't make him a good writer. It just means he knows what the audience wants to hear.
If you think a rapper is good because he knows how to pull your strings, then you're an idiot.