Glory
Any time you exercise your passion at work—drawing is your passion, right?—you're bound to feel good about it. Sure, you're inevitably peddling some tempered fraction of the true artistry that is Your Craft, but most people are filling out TPS reports and attending three-hour meetings for a living. As a sketch artist, you're drawing stuff. Feels pretty good, right?
It'll also feel pretty good when your sketches are used by the justice system, either as a tool to catch potential baddies, or as the only glimpse the public is allowed to have at a private courtroom trial where cameras and recording devices aren't allowed. Just make sure to take some you-time to practice your passions—comics? Portraiture? Landscapes?—and you'll avoid turning your beloved hobby into a chore.