The essential Albums

Based on Marcus's thread, I'm wanting to expand my listening horizons so are looking for album recommendations, this ain't a competition though there are some rules, mainly cause I dont want some idiot listing 100 albums

1. Only list one album at a time
2. wait a decent amount of time between listing an album, like a week
3. Album has to be on spotify www.spotify.com
4. post a link to the album on spotify