I started working with VMs several years ago, manually setting up a Virtualbox image. It would take around 30 minutes, and whenever I'd screw something up I'd have to delete it and redo the whole thing. Sometimes I'd fat-finger a command and have to start the process all over again.

Once I got tired of that I started to look into Vagrant, which recommended using a tool like Puppet or Chef. That led me down the rabbit hole of learning Puppet, which made me want to have a GUI to be able to easily change some choices around without having to mess with the code itself.

So I created a simple HTML form with drop downs and buttons and released it thinking that maybe 10 people or so would find it useful.

Almost 4,000,000 servers created later, and I'm quite happy with how it's been received!