@thomthom said:

The problem with zooming in to be able to pick the point you want is that some times the model you work on is so large (geometrically) that you get viewport clipping.

When this happens I set the camera focal length quite large (>100mm) which helps with close zooms. Unfortunately after a push-pull or other operation, Sketch-up will automatically revert back to the default focal length, which seems to be 35mm, and you have to reset to the larger figure in order to continue...until it decides to reset again for some reason. I love Sketch-up but sometimes its behaviour drives me to drink!

1. The ability to force a snap to a specific point, especially a mid-point or circle center, instead of having to estimate by eye and hover the cursor over your best guess, which sometimes takes a while, and sometimes doesn't seem to work at all.

2. Making the zoom function behave logically when the cursor is over empty space (as someone else already pointed out)

3. Allowing construction line placement to snap to points not on the plane of the construction line