I compliment her on the common sense
Metaphorically, he’s paying homage to rapper Common (previously known as Common Sense) who wrote the now legendary hip-hop track, I Used to Love H.E.R..
The reason Lupe alludes to Common so much this verse is because the song I Used to Love H.E.R., subtly personifies hip-hop as a woman. Lupe is paying homage to that great song through Sunshine. He also appreciates hip-hop having artists as thoughtful and as smart as Common, and thusly compliments H.E.R. on it.
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