Whether it was an album that introduced you to a whole new genre of music, an album you listened to over and over to get you through a rough time, an album that invokes a certain period in your life such as travel/roadtrip, etc. You don't need to explain the context if you don't want to, just list (or post a photo) of the album. Some might double as your favorite albums ever, but some might not. For me, I realized most of the albums were ones that introduced me to a whole new genre of music... Only two of these below would be in my "favorite album of all time" list.
This one I always associate with a rough break-up:
This one I always associate with a rough break-up: