I am using StarUML as an agile means to communicate initial sketches of system design prior to any code being written.

As such these designs typically explore hypothesis about the system design. It would be great if the diagrams could reflect this by looking more informal and hand drawn.

I think the current rendering of the diagrams looks great as formal designs.

For Agile development, it would be great to be less formal and convey to the team they have wiggle room to make adjustments on the design.