Please ask yourself why. In reality, MongoDB has almost all of the same limitations of MySQL and PostgreSQL, but lacks the production proven record. In addition, MongoDB has very weak durability guarantees on a single server, poor performance for data that is not in-memory, and continues some common SQL/ACID scalability pitfalls (use of arbitrary indexes and ad-hoc queries).
Outside of this, you need to switch the question you ask from "what data do I need to capture?" to "what questions do I need to answer?"
Outside of this, you need to switch the question you ask from "what data do I need to capture?" to "what questions do I need to answer?"