Apple just released a list of the 10 emojis that people use the most. They say they got the info from collecting anonymous data, so in theory they're not cataloging everything you text. In theory.
1. The "laughing so hard I'm crying" face.
2. The red heart.
3. The sad crying face.
4. The face with hearts for eyes.
5. The kissing face.
6. The face that's rolling its eyes.
7. The skull.
8. The blushing face.
9. The sad face with the wide open, frowning mouth.
10. The "thinking" face, with the hand resting on its chin.