Any job can feel stressful under the right situations. I had a pretty good example of this not that long ago.
I work as a cashier in one of the many stores of the largest grocery store chain in my country, most days are pretty sweet and work goes by with little stress and few problems. Now one day I show up to work and one of my supervisors comes up to me and asks me if I'll go work in one of the stores downtown because they were short on people. Thinking it would just be a change of pace I agree and get a lift downtown to go work there. One of the first things I notice is that none of my co-workers there are smiling and that they have hunched shoulders and don't greet the customer. I take over for the manager of the store who was filling the gap while I was on my way and start working as usual. When the day is over I've noticed the following problems.
1. The cash in the register is not ordered by value as it is where I work, but rather is just randomly placed everywhere, and the placement is different on each register.
2. Being in an area where a lot of small purchases are made rather than few big ones, the coins run out quicker, yet the registers are not loaded with more coin to make up for that.
3. There is no signal system to communicate with your co-workers like where I work (we can press a button and a bell tone will ring, what we communicate with the bells depends on how often in a row we ring it).
4. The workers there are uninformed on many aspects of how the program they are working with works and the setup of the store.
5. With the lack of workers there were no workers that could handle unexpected problems without sacrificing performing their main duty at work.
6. The manager is doing his paperwork during work hours rather than outside of work hours so he is not available to assist around the store at most times.
7. There are not trashcans, cleaning paper, staplers and other items you might need during the day at each register.
8. Not all of the workers speak the home language causing communication problems.
9. At the end of the day the store is not properly cleaned, leaving floors dirty and not all return items returned to their place.
At the end of the day I even found out that the manager was still busy with some of his work so he couldn't drive me back to my usual workplace so I could pick up my car, so I had to take the bus back to where I work, then drive from there home. In comparison the manager of the store where I work paces out his work more and can normally just leave as the store closes.
Now while I normally end work on Mondays I go meet up with some friends at the local hobby store and play Magic: The Gathering, that evening though I was feeling way too tired to attend and just relaxed for a bit and went to sleep.
These days when I attend work I appreciate all of the order and the abundance of workers and high work ethic held there when I think of all of the chaos in the store downtown. Even during bad days at my workplace I can think to myself that at least I am not working downtown. So the same simple job can really be different in terms of how stressful it can be, depending on the situation.