It would be great to be able to add a keyframe using just a shortcut key, just like we can do in After Effects. The way it works in AE is whatever layer(s) you have selected, at the playhead, when you push ALT/OPT + P it will create a new position keyframe.
This is a super fast way to choose your existing position as the start point of an animation without having to manually activate the stopwatch, and then your next position adjustment will automatically keyframe for you.
I'm working on something right now where I keep wishing I could do this, but it's not possible... yet!