Hours? Days? Months? Years? Decades? Did you need to be there when it was initially released? Does it have to have some sort of personal significance behind it?
Personal significance helps greatly, but not always necessary. The least amount of time for me to give a 10/10 score was Kayo Dot, took me probably 8 months and who knows how many listens. The longest that I can recall is Tool - Lateralus: over 3 years, about 5 concerts, and at least 1000 hours of listening. Finally I thought "shit yeah, this is 10/10 BUY OR DIE!!!111" (yes, I think in trailing off exclamation points turning into numbers).
Personal significance helps greatly, but not always necessary. The least amount of time for me to give a 10/10 score was Kayo Dot, took me probably 8 months and who knows how many listens. The longest that I can recall is Tool - Lateralus: over 3 years, about 5 concerts, and at least 1000 hours of listening. Finally I thought "shit yeah, this is 10/10 BUY OR DIE!!!111" (yes, I think in trailing off exclamation points turning into numbers).