There's a kind of job that I think I wouldn't support like working in a big factory with machines, a lot of noise, with a very strictly timetable and without human contact. Or worse if it's possible in a abattoir. I cannot imagine the life of this workers. But I know someone must do this terrible work if we continue eating meat.
Sometimes I become tired of my job, but I know is really not a bad job. I believe that I help people when I can and this is a satisfaction for me. And people is generally very kindly.(I work in a tourist office)