I quite like the peanut lighter (although I had to replace the o-ring), but my back pocket is usually the only place I have room for something as rarely used as a lighter. They are also a bit fiddly, in that you have to unscrew the top to get them open, and then they are quite small to use, and it sometimes takes half a dozen or more attempts to light it. They aren't ideal if you have cold hands.

I don't like Zippos. Too unreliable (due to evaporation). I have a couple of of those other liquid fuel lighters (mine are from Imco) and they are certainly fun - especially the candle mode - but they also suffer from evaporation.