Quoted from Hawks:Not sure if a poll has been conducted before
https://pinside.com/pinball/forum/topic/what-is-the-most-important-in-pinball
that was over 2+years ago.
judging by changes in attitudes since then, theme [especially], art, lightshow, and immersion should be up; at the expense of layout and gameplay.
an option missing from both polls: having enough money.