I have a weird fascination with NoSQL Databases. I like to tell myself that the future is free of Relational DBs, even if I don't believe it. Of all the NoSQL Databases I have tried (Mongo, Couch, Cassandra), I consider MongoDB to be my favorite. It is easy to get up and running, and I find the Mongoose ORM both intuitive and powerful. If I know that I won't need to perform any complicated Database queries, Mongo is my go-to Database.
"No database makes you more productive."