It's no secret that I'm in love with Go. It's also no secret that I really, really prefer MongoDB over most other datastores, with the exception of some key/value stores like bboltdb. This is by no means a sales pitch for any of these. At the end of the day, know your tools well and get the job done. I will work with anything that makes sense for the situation. Now… with that said, Go and MongoDB are my goto (no pun intended) for prototyping as well as “get s**t done” (within reason).