Create more collision detection tutorials.
You have some very simple collision detection tutorials, but I'd love to see them expanded. It just talks about sphere/sphere collisions. As a starting point, can you help me figure out how to determine if a point is in a sphere or if a point is in a bounding box? And what if the bounding box isn't axis-aligned?
I think it would be interesting if you wrote some tutorials on one of the MonoGame compatible NuGet packages that handle collision detection. I see CollisionGrid, CollisionBuddy, FarseerPhysics, MonoGame.SceneGraph, they all look like they might make collision detection easier.