My preferred way to start a fire? That's a simple answer, although not listed in the poll.
Have a buddy along to start it!
Hey, it's something of an old Cowboy thing. Never walk when you can ride, never stand when you can sit. And always sit in the middle when riding in the pickup truck - you don't have to drive, and you don't have to open/close the gates!
Since I forge up 5 to 6 hundred traditional steel flint strikers a year, based on originals from over 2500 years of their use, I'm more than a little biased in this poll - Flint and Steel of course.
Fire by friction is satisfying, and there's just something mesmerizing about using the magnifying lens. Fire by chemical reactions is ... amazing the first time, but scary once the realization sets in. Soooo many times I've been way too close to an accidental fire when messing around with chemicals. Now the fire piston has all the look of a miracle. Really astounds anyone who doesn't understand the physics involved. But how may of you, besides blacksmiths, have taken a piece of cold iron and hammered on it until the end glowed red - to then light a fire? It still takes a strong arm, steady breathing, and tired muscles. (Every hammer blow puts energy into the iron, and it starts to accumulate in the iron. If you hammer hard enough and fast enough, you add energy faster than it radiates/dissipates from the iron. Eventually it gets hot enough that the iron starts to glow red, and you can touch it to tinder to start a fire. But have a friend there to take over and finish making the fire - because you will be pretty tuckered out.) Heck, even jumpering a screwdriver across the terminals of a car battery to get/catch a spark amazes some people. But a lot of people are too easily impressed these days.
Just my humble thoughts to share.
Mike Ameling - alledged blacksmith and known iron torturer