If you do a search, you will find interesting threads on the different types of lighters. It is very interesting indeed.
To answer your question though, for urban needs only, I always carry a Windmill Delta stormproof lighter as part of my EDC. I do not smoke, so the gas will last me virtually forever. I used to smoke and used a Zippo lighter. I find gas lighters to be better than any fuel lighter because of the evaporation problem. As a piece of equipment, however, the Zippo in urban settings is great and will last forever.
I would not, however, only depend on a Zippo, or any other lighter in the wilderness. I have lots of firemaking things as part of my kit. I even have a Prince pocket torch, about 100 waterproof matches, a Magnesium firestarting tool, and other small disposable butane gas lighters for "just in case"