What's your personality type?
I am largely a sceptic of all personality trait profiling. There are so many, all claiming to be 'scientifically robust'. However, they tend to only tell you what you could've worked out yourself from a 5 minute conversation with the person. Most of them have about as much validity as a horoscope, dripping with confirmation bias.
Habits caused by repetition
Once again research proves what we probably already know. Amazingly, repeating an action leads to habituation! Who'd have thought?