Having worked in a call center myself at one point, I'd say the primary difference is the directly-customer-facing nature of that work. When a call comes in (

Having worked in a call center myself at one point, I'd say the primary difference is the directly-customer-facing nature of that work. When a call comes in (and there are often a large number of simultaneous calls) someone has to be there at their desk to receive it - whereas with yours and my current gigs, the worst that'll happen is some production issue with a reasonable SLA.