For reference, I work overnights at a plant and I'm the only one there. It is possible to run this small plant with only one person but the overnight work SHOULD be done by two people (another topic).
I do NOT like calling on call, for any reason. I don't want to. I get that those guys chose their job and knew they'd have to be on on-call sometimes but I don't like it. I don't like waking them up, I don't like disturbing their rest, and I especially don't like when they have to attend to something. I woke them from a good sleep just so they can hear about some bs alarm. I get it, we need them on standby in case an emergency comes up for whatever reason because I can't leave. Either way, I don't like doing it. I'd hate to be on call. Just let me sleep. I just want them to get an uninterrupted rest.