Book Covers: What Sucks You In?

I'm heading back home after a weekend in New Orleans to stand in my sister's wedding, so today's post will be a quick question inspired by Sarah Skilton's post on this topic. Most people admit that a great cover can suck them in to buy a book, but what kind of cover do you prefer?

Do you want a full face to put with a name, like this:

Vampire Academy (Vampire Academy, Book 1)

Or do you prefer the body part method and leave the rest to the imagination? Like this...

Only the Good Spy Young (Gallagher Girls)

Or a combo, some characters seen, some not.

Inside Out

Or the romance standby and a personal favorite of mine, the yummy male torso...

The Perfect Play (A Play-by-Play Novel)

Or something more abstract...

Wake (Wake Series, Book 1)

What catches your eye to most? And do certain kinds of covers make you NOT want to buy a book? Which type of cover do you prefer? What do you picture for your own book?