Personally for me it is a mini-bic lighter or permanent match. Sure I carry a few windproof/waterproof matches with a striker and sometimes regular household strike anywhere matches as well, however, if I had to choose then I would grab either the lighter or the permanent match and leave the matches at home. The reasons why are because I am not anywhere near any extremely high altitudes so that is not an issue with the lighter. Also the lighter and permanent match provide far more lights for the weight and space they take up. For those that don't know, I am fanatical about weight and space being kept at a minimum. <img src="/images/graemlins/smile.gif" alt="" /> The lighter and the permanent match also can throw a nice spark even after the fuel is all gone. As a matter of fact my toughest decision (and maybe you guys can help me with this one) is choosing between the mini-bic lighter and the permanent match. They are both about the same size but the mini-bic is lighter weight (remember I'm fanatical about space and weight) however, the permanent match has a lanyard ring which is great for attaching to my key ring, backpack, belt, wrist (when needed) etc. Also, the permanent match is easier to hold while burning for a long time without burning your fingers but the min-bic will take a lot longer to run out of fuel.