Bakugo's new habit echoes AFO's quirk. he draws inspiration from other people and incorporates their traits, enriching his own identity and proudly showing gratitude and affection. yet he's shown sharing pieces of himself with others, willingly, even when it costs him something +
It's also why he cries when he learns that Izuku lost his quirk. He's masking his concern by tying it (once again) with hero work, but really he's sad *for* him because otherwise he wouldn't blame himself.