Like someone mentioned above, Zippo and Bics are still my favorites. The Zippo for its simplicity, wide range of fuels, and simply how cool they are. The Bic I like for its reliability, low price, and they can be stored for a long time. I also find that they are more durable then the average cheapy lighter.

I've got a lot of other lighters, both expensive and inexpensive and I always go back to those two.

(That's not to say I don't carry backups as well as other methods [ferro-rod])