Professionals and companies have a great opportunity to create trust and, just as importantly, connect with their users. Use your "About" page to express what you are all about.
Ask yourself, "who do I want to work with?" "what can I say/show to connect with them?" "would I work with me?" "what image should I portray?" You will come up with some great ideas and in the end connect to your users. If you want to connect with many people in general then keep your content very generic and general. If you want to work with a specific client base then targe them. "I'm a biker and want to work primarily with bikers," will cut out a large number of users but it will get you what you want.
Be careful to limit your "about" content to the "about" page. If people want to know about you they will go looking. Use your site to market your products or services and area and when people trust the content they will seek your profile out. When they get there you can let it shine and convert them to work with you.
