Feel: the selection time can draw one or two in hand, the main try rolling bar skin, hurt the skin too.
Color is not easy to halo Eyeliner: many products will have iridescent phenomenon. That can draw a hand, dry when touch, will see the halo.
Gentle ingredients: pick some milder products at the time of picking up. It's easier to remove makeup, and warm water can be cleaned.
Whether some products do decolorization: when will fall down, you can choose to draw in the hand, dry, not easy dregs is good.
Eyeliner is faster: when you choose it, paint it on your hand. If it's easy to paint and quick to dry, then it's ok.