I have problem with the term greatness, and while the phrase "must ... before you die" used in the recent spate of anthologies such as 1001 movies, 1001 books and 1001 novels carries the same urgency as 'greatest' I find it less value laden. Some cultural artifacts need to be experienced not for their level of 'greatness' but for their level of 'interestingness' and 'what-is-ness' relevant to the nature of that particular type of cultural production.
via babynox
See also:
greatness - novel - list of lists