Out of the Blue contains many of Electric Light Orchestra's classics, such as Turn to Stone, Sweet Talkin' Woman and Mr. Blue Sky. And it isn't just those classics that make it good, the album is riddled with other good songs, too. To me, this is their best album.
While Mr. Blue Sky at this point is probably the album's most famous track (thanks to Guardians of the Galaxy), Turn to Stone is my favorite. The song is just so catchy! This album is a very good one, 86/100.