Bad Guy by Eminem. The internal struggles and conflicts.
This song is a real gem. It's basically a seven minute rant of Eminem's entire career; everything he regrets, everything he doesn't. Eminem is torn in half almost, as he conflicts with himself in one song. He praises himself, yet hates himself, and that's powerful. At one point he quotes one of his most popular songs from the 2000s, Stan, as he seems like he regrets writing it. He says "Guess 90 on the freeway wasn't the brightest idea," in the same enunciation as the song's main character Stan does when he is angry that Eminem wouldn't answer his fan mail. Eminem always brings his pain to the mic, and this one of his greatest examples.