Kat Von D Everlasting Liquid Lipstick ($20 each) are one of the best liquid lipsticks–they have opaque pigmentation in a single swipe, the colors are offered in a wide range, the have good longevity. I tried two shades–Lolita and the recently released Lolita II.
Both shades are very flattering. Lolita is slightly deeper and more rose. Lolita 2 has a touch of terra cotta and runs slightly more nude. I love having these in my purse for a quick, modern lip. These are available at Sephora and Kat Von D’s website.