I like to think of a character like "he had a life before i start to play him" And because of that heīs going to need some other skills, probably non-runner skills. I know a bunch of military people, rangers, anti air officers, tank personel etc and all of them know rather many things beside their "runner" skills. Always make the chars feel alive, get the story, give them related skills to their life/work/hobby and get a picture of them.
Flavor is everything, specially in SR.