Shoulder tattoos are becoming increasingly common, as they open the door to some rather interesting designs; but some of the old standbys of the past 5 to 10 years are still popular, including lower back tattoo designs and hip tattoos. On women, these positions can be sensual, playful, or even ironic, so there's little chance that they will ever go "out of style" like some styles of tattoos will.
Lest I forget some of the more delicate fonts, here is a great tattoo lettering style for poems, song lyrics, scripted works, or even quotes. This would be a great style to work into a larger floral or nature piece as well.