I never got the hang of applying liquid eyeliner; not enough practice, I guess. So usually, I use a pencil or powder eyeliner in a black or dark brown shade, but usually black.
I can get a defined line with a pencil eyeliner, similar to using a liquid eyeliner, but not as harsh. However, if I am trying to achieve smoky eyes, I switch to a powder eyeliner because it is easier to blend and achieve smokiness than if I used a pencil eyeliner.
Either way, I always use eyeliner when I do my makeup. Sometimes more, sometimes less, but I never leave the house en femme without something lining my peepers.
Which brings me to an article that appeared last night on The Huffington Post. "Think Ink" by Napoleon Perdis reveals "why black eyeliner is eternal" and affirms my dependence on the black wand of makeup magic.