David Kohn, a professional who initially learned SQL by reading documentation, watching videos, and trying to solve his own problems, was drawn to PostgreSQL because of its strong typing, security features, and community support. He switched from MySQL to PostgreSQL around 2014-15 due to its better JSON support and stronger community. Kohn has used SQL throughout his career, including optimizing a PHP-based app that accessed multiple databases, and has found that using PostgreSQL can make life easier on the front end. He appreciates tools like Postico and pgModeler for their ease of use and design. The PostgreSQL community has been supportive and encouraging for him, with notable contributors like Bruce Momjian, Corey Huinker, and Melanie Plageman. Kohn is now the Education Engineering Manager at Timescale, where he strives to improve how developers learn about Postgres and time-series databases.