Goodbye MonoDevelop, hello Vim
One thing that has been getting on my nerves ever since I started working with Unity has been MonoDevelop. While it is a good IDE for the most part it suffered from a number of annoying issues, such as folds randomly opening, poor performance, and auto completion randomly not working. Your mileage may vary, and for the most parts it was doing its job, but the annoying hiccups kept happening all the time.