I love my Zippos, even when/if I quit smoking, I'll still carry fire (Primal thing with me to). I do keep a few disposables around for emergencys and when my Zippo runs out of fuel or flint when I don't have access to replacement. I'm inclined not to lose a Zippo, because it's a Zippo, not just some cheap piece of sh*# disposable. Also they're more rugged and dependable if your conscientious about replenishing fuel and flint. No, it won't light the first time you strike it every time, but it will light if there is fuel/flint. If a disposable decides not to light (has happened many times) even if there is fuel/flint your screwed, might as well toss it in the trash. Smokers tend to steal one another's disposable lighters ( myself excluded, never have), but if you don't give my Zippo back after borrowing it, I come looking for it. And hey I like the smell of Lighter fluid. I also think my cigerettes taste better being lit with a zippo over butane. My Zippos only leak if I overfill them, and if I do overfill it, I just light it and let it burn for few seconds to burn off excess fuel. That way you don't have to worry about leaks.
Seems your either a Zippo carrier or a disposable carrier. My opinion is that people who smoke and don't care for Zippos usually aren't up for the maintenance(actually refilling it and replacing flint when needed), actually they're just that lazy.