I have had a number of MRIs. I do hate the noise, but like the others I try to take my mind off it , usually by seeing how high I can count in Italian or French. I keep losing count and have to start all over again, so time passes quite quickly.
Other times I try to work out the pattern of the different noises and guess how long it will be before the next loud part.
I think it is the fear of the unknown, rather than the MRI itself that scares many people. During the last one I had a few months ago, the radiographer kept asking if I was OK, as I was concentrating so much on counting backwards in French, I was hardly moving.
One of the times I had an MRI, the fire alarm went off and my husband told me afterwards that the place had been full of firemen. I was oblivious to all the commotion, which fortunately turned out to be a false alarm.