Fixed blades for me, both in the city and out in the woods. I find no use for folders, with the exception of multitools like Leathermans and SAKs. To me, depending on how jovial I'm feeling at the moment, a folding knife is either a poor compromise only barely adequate, or nothing more than a knife that's already broken in two parts. Don't like 'em. But with the law being what it is with regard to fixed blades in many places, it's somewhat understandable that folders are all the rage.