Trying to figure out how to rank such desperately different music is no easy task. The way I went about ranking these albums was impact, fondness, and how much do I still listen to them to this day. Best example of would be something like Radiohead's Kid A: an album that completely opened up a new world of music to me that I remember fondly, but almost never listen to anymore (though I probably should go back and do so). I would start by forming some criteria for yourself and work it out that way.
Thanks for the kind words! Glad you enjoyed these picks!