I'm president of a residential real estate franchise, Real Living. In the real estate industry, it has been common practice to use a photo as the centerpiece of an agent's personal brand. That's just the way it is. In most other businesses, the visualization of your personal brand is your name and title on the company's business card. The company's name and logo has been the visualization of both the corporate brand and yours.
Times are changing though. Today's employees come to the workplace expecting the ability to more thoroughly express their personal brands. That's because they've been doing it online since middle school through the social networking sites. It's truly part of who they are. To expect them to come into your workplace and inhabit a sterile cubicle is crazy. Allowing enough room for personal expression not only makes for a happier employer - but a more creative, productive work environment. Get some inspiration.
So embrace creativity in your office. Celebrate when an employee pins a special photo on her wall. Taking the time to know the personal side of the people you work with makes working together all the more worthwhile.