Of course, this is the one that started it all, the trailblazing ambient album—but it's really only half good: '1/1' and '1/2' being a billion times better than '2/1' and '2/2'. All that being said, even if it's a 50% F-grade record, it's an important recording I hold dear to my heart. I'd just have preferred to encounter Eno's later Ambient 2 or Ambient 4 on this list because those are absolute 5s.