I feel like being nerd is not about the superficial quality; it's about how nerds approach life. It's much more emotional and mental than it is you're some fat guy living in your mom's basement, which I think is just a hacky stereotype.
You can have a phenomenal booth artist and he can get in there and be a technician in the booth and it won't translate on the stage. I think that's what makes emcees emcees. Some rapper dudes are great rappers but it don't translate on stage.