Hi guys. Not sure if this is the place to post this but here it is. There may already be a tool out there that will do this but if not then maybe the developers would consider making it.
I find myself having to select every other vertex like this almost on a daily bases,
or every two, like this.
The same could apply to faces like this.
If there is a tool like this in Blender please let me know! If not then it should be developed, I would use it every day! I think it should be called the stagger selector tool.