I use two different things in my make up kit, usually when I want my girls to have "bigger" eyes I use this eyeliner from the Mac Pro stores called eggshell, or something? Its an off white color, which looks more natural.
If I want a brighter, wide eyed look, I use this thing from Cargo called an Eye-lighter, in gold, it has two ends for the inner corner and the outer.
Both good stuff.
I normally tend to stray away from white/silvery colored things, because it looks un natural on my skin tone and on the girls I do make up on.
I say if your light skinned, go for white/silver, if your tanned, go for goldish colors, if your deep dark, go for bronzey colors.