Profile David Watson Hiii everyone...David here. I am a medical student and researching about the pros and cons of vaping E-liquids and electronic cigarettes. My hobbies are wondering new places and listening soft music. Last activity: on 03/10/2017 Joined: on 03/10/2017 https://www.diyeliquids.co.uk/e-liquids-158 Design quotient Earn DQ points by participating in a challenge. What are (DQ) Points? DQ points are a measure of your contributions, they correspond to how active you are in the Research, Ideas and Evaluation phases of a challenge.