First of all, let me tell you one thing. I'm not a photographer and know nothing about photography.
I'm a programmer making a software program for photographers, and I would like to know what are the most important exif data for photographers to look at when seeing other photographers' art work.
I prefer that the list you will give will be of 10 items or less. But if you feel that 10 is not enough you can expand your list a little bit more.