I prefer a soft flame, but I don't have a soft flame zippo to try out, so I don't know if you will get any of that lighter fluid taste. I'd imagine that it's the same idea as butane - if you get a high quality fuel with fewer impurities, you'll get a cleaner light (as opposed to using one of those stick lighters or something).
There's always a time and place for each - I love matches, but they're hard to use with any kind of wind/larger gauges. Then a soft flame lighter just doesn't cut it sometimes. And then you just have to resort to a butane torch. If I could, I'd keep all three on hand to use what I want when I want, but I usually only have any 1 or 2 on me at a given time.