I also worked for 10 years at a small movie theater in Italy, and very much share what you described. The noises, the lights, the repetitive and almost ritual actions. A very nice illustration the projectionist's life is told in the excellent movie "Cinema Paradiso" [1,2].

[1] https://en.wikipedia.org/wiki/Cinema_Paradiso [2] https://www.youtube.com/watch?v=zOgDcysdjN4