Persistency
This is just a simple observation from the Google Python class put on youtube. It consists of 6 videos.
Day 1 Part 1. 332886 views.
Day 1 Part 2. 82163 views.
Day 2 Part 1. 63317 views.
Day 2 Part 2. 38000 views.
Day 2 Part 3. 30991 views.
Day 2 Part 4. 28531 views.
¾ give up on the first video and only less than 1/10 can finish the whole session roughly. What I have learnt is persistency. Even if you perform the worst in the final group, you are among the top 10%.