Best part-time job: Working in the cafeteria at college. I loved the work and my coworkers. All walks of life, from the rich kid whose father insisted he made his own money in school, to the "townies", to kids like me, who needed the money. We had a blast. I ended up working in bar/restaurants or Country Clubs as a second job until just recently. Great experiences.
Worst: Trying to get people to buy pictures of their ugly families at Olan Mills. I am nothing close to a salesperson. I would be sick to my stomach on the way in every night.