I've dedicated 43 years to the practice of architecture. While once licensed in Washington, DC, through a logistical nightmare a number of years ago, my registration was lost.
I spent the first half of my career in medical architecture, and the second half primarily focused upon historic preservation. That said, there probably isn't a building type I haven't designed at least one of, from the smallest of residential additions to a half-billion-dollar airport terminal. I feel honored to have spent the majority of my waking hours contributing to the world's built environment.