Nice to see someone else mention Kacey Musgraves.
I was very impressed with the album as well.

Arctic Monkeys - AM
David Bowie - The Next Day
Kanye West - Yeezus
Sigur Rós - Kveikur
M.I.A. - Matangi
Arcade Fire - Reflektor
of Montreal - Lousy With Sylvianbriar
My Bloody Valentine - m b v

Just remembered another album from this year I liked very much - The Still Life by Alessi's Ark.

Adding Avril Lavigne to my list.