[danielweber]

Database preference is almost silly, once you have figured out the general type of DB you need. If you are in the realm of open-source RDBMS, "do you prefer MySQL or Postgres?" seems designed to just start a religious war. (Yes, there are differences, and I could tell them to you. If you want the differences, ask.)

Added:

How are you using hobbies to evaluate the person's personality matters? Does someone who coaches his son's ultimate Frisbee team have a better personality than someone who plays with his Raspberry Pi?