The only reason I have yet to purchase a full size Smashbox Limitless Eye Liner in Onyx is that I got four or five of them as gifts with purchase from various sources and I never had to actually go and get one. Smashbox Limitless eye pencils are waterproof, a quality I love in eyeliner, especially when I use them on the inner rim or to tightline. They make a great base for a budge-proof smoky eye and are ideal on a hazy rainy day.
Onyx is a matte black. If you're all about glossy eyeliners this Smashbox product is probably not for you, but I love the not-quite-black effect and appreciate its wearbility. The full size pencil comes with a built-in sharpener attached to the end, which is a nice touch when you're on the go and for those of us who keep misplacing our sharpeners.
Bottom Line: a hard worker.
Smashbox Limitless Eye Liner ($19) from Nordstrom, Sephora, Ulta, and smashbox.com.