We went during our children's spring break last year. This was NOT the week immediately prior to Easter (although now I can't remember the exact dates.) I said I would NEVER go that week again. Traffic was awful. We had to wait in line to get in, wait in line to eat, wait in line to ride, wait in line to pee.
I hated it. It was the first and only trip to Disney where I was actually ready to go home at the end of the week.