Bleach (20th Anniversary Edition)by Nirvana

This album is the full circle look at where Nirvana's career past, present and future. For instance, "About a Girl" is very much in the vein of the Beatles influences that Kurt later gets into; "Downer" is reminiscent of late 70's/80's punk which foreshadows In Utero. It's the album that shows where they started, where they're going and where they end up.