1. You play both.
  2. It's boring if they're too easy.
  3. If they're too hard you want to give up.
  4. Cheating is fun while you do it, but afterwards you feel a little guilty.
  5. Once you're finished, your friends can get their turn.
  6. Sometimes they're over-used and have lots of issues.
  7. A lot of the time, the least visually appealing ones are the easiest.
  8. Sometimes there are two players, and you have to kick some ass.
  9. When you've mastered with one, you only want to move on to the next.
  10. It's socially acceptable to scream when you finish.