Ability to tag anchor points as PRIORITY anchor points.
When snapping objects together it is often the case that lots of other things want to put themselves forward as the thing that wants to grab your snapping choice. If I could create shapes (for example) and select an anchor point and mark it as a priority anchor, it would override other suggestions. That way I can quickly and accurately snap one object to another with no ambiguity.
Does holding Ctrl while snapping help with prioritization?
If not — can you provide an example of a case when it fails?
Either way — please comment back.