I always bring one of those magnesium/flint strikers and a film canister full of tinder on backpacking trips. In cold weather, I have no interest in bringing a lighter of any kind, and I don't like matches for a variety of reasons. The last backpacking trip I brought a lighter, I woke up cold in the morning, I wanted to get some warm food going so I tried the lighter to light my stove. From a combination of my fingers being very cold and the lighter fuel being cold, I couldn't get the dang thing to even light. I set a bit of tinder on a rock, struck a spark to it with my flint–it lit–I tossed the flaming tinder into my stove and poof! done deal (and remember the alcohol was as cold as the lighter fuel).
Tinder is a bit tricky because not a lot of natural materials will easily light with a spark. Some grasses make florets that are full of very fine hairs which will catch a spark, and cottonwood tree fruit is hairy enough to catch a spark, but these kinds of materials can't be relied upon when hiking (even if I actively try to look for them along the trail). I use cotton balls (from Walgreens or anywhere) that I've rubbed in vaseline, and I store them in a film canister. If you want to make some, make sure to pull the cotton out of its "ball" form to saturate most every fiber. You only need a tiny pinch of this material to start a fire, as the vaseline makes the cotton burn a pretty long time. Dryer lint is mostly cotton fiber, and will work equally well as the storebought cotton balls.
That said, I have heard that if you do a thorough job scraping the magnesium stuff onto, say, fine broken up grasses, which wouldn't ordinarily light with a spark, the magnesium will cause them to light. But, greasy cotton isn't very heavy to carry, and throwing a spark onto a magnesium shaving is kind of tricky in practice. So personally, I'll probably upgrade to a Firesteel, which is lighter in weight than the flint and magnesium striker.
In warm weather, if there's not a lot of wind, a bic lighter (if it has enough fuel) will probably perform better for just lighting a stove, but I'm completely convinced that a flint and some tinder is best for all around stove lighting in any condition and campfire lighting in any condition. A bic lighter is quite lightweight, and a flint plus a bit of tinder is heavier than just the lighter, but performance makes the difference for me and warrants that I carry the extra ounce so I don't get a headache from f****ing with a lighter for five minutes and tearing up my finger tips, or hypothermia from being unable to get a fire started with a cold or out-of-fuel lighter.