I don't think there's a thread like this anywhere, so I'm starting one. I use a wide assortment of router bits and endmills on my machine, for a variety of tasks. While some bits can be used for different material and purposes, they work optimally when used for the process and materials they were designed for.
Before I begin, here's how I currently sort them all. The packages below show all the spares I keep on hand. These are mostly the smaller bits which get used frequently and are susceptible to breakage.