As per the title, what job have you had (past or present) that has been your most favourite job? By this I mean you looked forward to going to work, you enjoyed the work and overall you felt very happy working in the job.
I worked at the movies when I was in school and at uni and have to say that was probably the job that I most enjoyed when I look back on it, even despite the pay being very low compared to what I earn now.
Internal tech support at my university when I was a student there (basically a paid internship). I got paid about half of what a proper employee did, but had slightly lower expectations of my performance. Working at a uni meant getting exposed to a wide variety of stuff, like computers that operated laser cutters, to computers connected to chem lab equipment, and a variety of "interesting" problems to solve. Disliked my management, but really liked a few of my peers who did technical work. Also being a staff member meant getting access to the free coffee in the staff room (good machines worth thousands of dollars).