Steve could be objective about his appearance: he knew he was attractive, now, even if he forgot most of the time, because he was still just him. But he did know. He also knew that before Project Rebirth, he had been too scrawny, all skin and bones and sharp angles and no muscle, to be attractive. Bucky had always tried to convince him he was a catch, but they were best friends, and even Bucky had talked more about his personality than his appearance; they both knew no gal would be instantly attracted to his looks.

It was always a mixed feeling for him when someone complimented him; he appreciated it, because it was always nice to hear, but he'd done nothing for his looks, didn't even have to do anything to maintain his muscles. He ran and worked out because he had extra energy to burn, and just because he could, now, but he didn't have to.

Still, when Rogue complimented him, he knew she was seeing more than just his outward appearance, and mentioning his smile helped, too.

"Come on, flatterer," he said, swinging onto the bike and waiting for her to follow. He could've left the bike at home, taken a taxi to pick her up and get to the park -- but he knew she liked the bike, and he had a not-so-secret love of feeling her holding onto him, and moving with him into the turns.