I have been mostly using blender in orthographic mode but sometimes I use perspective view. My problem is that in perspective view the tools use is sometimes hyper sensitive. For example if I want to move a vertice. Even with shift the selection just moves so fast they just zap across the screen. Sometimes it could even be super slow. It is not a scale issue with my objects. I'm thinking this is because of some blender setting but why is perspective so unpredictable while ortho is perfectly fine?
Create 2 3D View windows. Creating many windows in Blender is Easy.
- One in Orthogonal View.
- Perspective View
Perform the operation in Orthogonal, while viewing in Perspective. Also start your change with the mouse reasonably far away from the item in question to dampen the operation. For example for small angles start with the mouse far away from the object.
Also other tools exist beyond Grab. Try the Snap operation.