I found a good website which had ten qualities all graphic designers should have to be successful which I found very interesting:

http://graphicdesignschools.com/resources/top-10-qualities-of-a-great-graphic-designer

1. Artistic Ability: A great graphic designer must be talented and have a variety of artistic skills and ability.
2. Client Oriented: A great graphic designer is able to work easily with clients to ensure that designs meet specifications.
3. Communication: A great graphic designer is able to effectively communicate with clients and other members of the design team to ensure they are on track with deadlines and other goals.
4. Creativity: A great graphic designer is very creative and can come up with new and exciting ideas for designs.
5. Knows Audience: A great graphic designer understands that different audiences respond to different images and can integrate this understanding into their designs.
6. Manages Priorities: A great graphic designer is able to work within boundaries of deadlines and changing priorities and can effectively manage a workload to meet deadlines and satisfy clients.
7. Open to Change: A great graphic designer hears all criticism with an open mind and is willing to change designs based on the needs or wants of a client or opinions of members of the design team.
8. Strategy: A great graphic designer understands how strategy plays a part in marketing and advertising, and is able to develop strategic ideas and work within the scope of a client's strategic plan to execute top notch designs.
9. Teamwork: A great graphic designer works well as part of a team and recognizes that all team members must work well together and communicate openly to get a project completed.
10. Technology: A great graphic designer is well-versed in a plethora of desktop publishing software and is able to quickly learn new programs and incorporate them into his or her work.