I'm not sure I define your examples as 'nerdy.'
Nerds are intellectual. They read science magazines for the science, story magazines for the literary quality.
Comic books? Those were regular children's reading 'til the 80s, and widespread among all ages now. Video games? Everybody plays them. Is Superman a geek about anything? Except Krypton, he was a geek about that in the silver and bronze ages, I would say no. Superman has broad interests, and his hobbies reflect them. The fortress has a lab, a gym, a zoo. He makes salad with thousand-planet dressing. He sews. He pulls practical jokes.
Both Clark and Superman are 'regular' guys, just on different scales. Of course, regular means different things to different people, and changes over time.