Don't ask why. I've always collected lighters. Bics, however, are simply too cheap for my mind to prioritize retaining them, and I find that they have a mysterious tendency to dissapear at the least opportune moments. Zippos, on the other hand, cost me a bit more, and as such, I tend to work a little harder to keep them around. I also love their classic design. There's something timeless about sparking up with a Zippo that really makes it worthwhile owning a few. Here are the ones I own:
This one is my favorite. I love the moth (it's not a butterfly >_> ) design. I've actually had two of these, but I lost my first one.
This was the first Zippo I ever owned. A little more manly than the preceding one, no doubt. It cost me a bit more than the others, but I think the finish is a little higher quality. At this point, I consider it a classic.
If you think this is similar to my moth one, you would be correct. They have the same finish; however, this one lacks the design and is actually a smaller model Zippo (I don't think the picture accurately reflects this). I like it because the colors are a bit more vivid than the moth; however, this one doesn't work as consistently well as my others.
... and finally, my latest acquisition:
This is a bit different from the others. It's a newer variety of Zippo, a Zippo Blu, which is a butane torch style lighter as opposed to the traditional varieties which take liquid fuel. As some of you may know, regular Zippos aren't all that great for your glass pipe/non-tobacco smoking needs; this one on the other had, should be perfect for such occassions. I also really dig the fluer de lis design on it. Should be an awesome addition to my collection. =)