My top 100 albums of 2015 based entirely on the total number of documented plays in iTunes, Google Music, Spotify, the Amazon Cloud Player, and physical media.  Every album on the list was purchased in some manner.

60-51

60.  Def Leppard - Def Leppard

59.  huntress - satanic

58.  tesseract - polaris

57.  chelsea wolfe - abyss

56.  armored saint - win hands down   

55.  ken mode - success

54.  lamb of god - vii strum und drang

53.  muse - drones

52.  refused - freedom

51.  carly rae jepson - emotion