I came to USA for my masters degree in Computer Engineering. Coming from a financially weak family, I had to work in my university's dining hall for my day to day expenses. There were variety of jobs in the Dining hall, one could be a Chef's assistant, a salad bar attendant, or cashier. The job I hated the most was that of dish washing, just because you don't have to use any brain, its a very mechanical job. Looking back at my career now, I think this is the worst job I ever had.