What I personally look for, in a colleague, a partner or an employee candidate, is a balance in his characteristics. Gunter has that quality at its best. He is self-reliant but humble, energetic but patient, sophisticated but always open to learning new things. He mostly works alone, but he is also a great team member.
Besides his great branding know-how and strategic thinking skills, he is always fun to work with. I highly recommend him and his professional services to start-ups that seek a new branding approach, or existing companies that plan to reconsider their brand architecture.