Most of the music that I listen to falls into the post-punk, new wave, avant-garde, and/or (electro-)industrial genres and moreover either tends to span from the mid-seventies to the mid-nineties or is more recent but is in a revival camp beholden to those genres and that era of time. As such, I suppose that would make the eighties my absolute favourite musical decade! (In fact of something of a late-seventies-to-mid-nineties-phile in general, with retro tastes in general!)
Some of my absolute favourite musical acts include: Joy Division and New Order, Skinny Puppy and its members' various other related projects like Download and ohGr, Bauhaus and Peter Murphy's solo work, Coil, Siouxsie and The Banshees, Depeche Mode, The Cure, Ministry, Soft Cell, Nine Inch Nails, Kraftwerk, J.G. Thirlwell, SWANS, David Bowie, Ladytron, Interpol, Meat Beat Manifesto, Nick Cave and The Bad Seeds, The Legendary Pink Dots, Stars of the Lid, Autechre, Aphex Twin, Massive Attack, Boards of Canada, Leonard Cohen, Pink Floyd, Death From Above 1979, Echo and The Bunnymen, Goblin, Godspeed! You Black Emperor, and most other music that is in similar vein to those choice examples.