Good design is creating lasting solutions to real problems. Good design challenges the status quo, always improving the current situation. Good design is adding value by creating beautiful, clear and cohesive solutions.
A good designer is always creating. Rough mockups or detailed drafts. A good designer knows how to focus in on the important parts of a project. He knows when to absorb a market report and when to trust his instincts. And a good designer has vision and an opinion but more importantly knows how to listen. To end users, to clients and to himself.