As an advanced user, I prefer Postgres over MySQL. MySQL was the first database I learned from my institute. I always have to undergo that infamous date and time dilemma many Java devs know. Both are adequate for a small project. When I worked on a project with a date and time-intensive data, I spent a lot of time dealing with the conversion and transition, leaving me frustrated. I tried Postgres to see how well it can perform. To my surprise, all became a breeze, and the transactions were faster too. I've been using Postgres ever since, and no more dilemma.