2. He got confident. Rob's increased physical fitness translated into a more confident, charming personality. That quiet boy we met at the beginning of Season 13 — who seemed more disinterested than shy — turned into a debonair young man who was willing to open up about his struggles (such as his father's death) and delight in his successes without seeming cocky.
3. He started working hard. The biggest problem for Rob heading into the season were the rumors that he'd only done DWTS because his mom made him and he was skimping on rehearsal time. It seemed like he wasn't really committed to the experience, and his iffy early dance moves did nothing to reassure us. But Rob steadily improved over the course of the season, and no matter how he felt going in, he was clearly deeply invested by the time he found himself for the Mirror Ball in the finale.
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