I like to see all of the following, to get a proper visual of the provider I'll be meeting. All of these is best, but a subset is fine too. It doesn't matter if the photo poses are innocent, flirty, or sexual. I just want to know what she looks like.
1. Some kind of facial shot. (I'm talking about a *photographic* shot.

) Doesn't have to fully show; blurred-out or partial is fine. As long as I can parse out a visual and see a sexy smile, it's all good.
2. Full body shot. That's what I'll be seeing when I walk in the door. I'll be in the minority and say that I kind of prefer the full body shots to leave a little to the imagination. You can find naked photos on any porn site. But a little mystery prior to meeting the provider adds to the fun.
3. Breasts. Any angle is fine, as long as it shows their size and shape.
4. Some kind of a candid photo that shows her having fun. It gives an insight into her personality: sweet, feisty, sultry, or any combination of these, which affects the general feel of the session.
5. Bathtub/jacuzzi photo, with or without foam. It sends messages of both "sexy" and "clean".