idio- one's own, personal, separate, distinct. -ist one that performs a specified action. The -l- in the middle just makes the whole thing sound better.
Often it's the little details that make us want something, appreciate something, or love something. We don't notice it, it's quiet and subtle but it's these little details that inspire us, make us think in new directions, move us little by little in tiny bite size pieces towards something else.