My absolute favorites tend to hold their top place over time for me: Billy Idol, Motley Crue, GACKT

Others that are always up there in my favs are Goldfinger, X Japan, Sum 41, Twisted Sister

Dude its always changing, but I'll just do those I've been listening to a lot lately:

Nirvana,
In Flames,
Bastille,
Grateful Dead,
City and Colour,
The Black Keys,
Mungo Jerry,
Emphatic,
Aquilo,
The Animals.

Out of just lone artists or like duo's here are my tippity tops:

Simon and Garfunkel,
Matisyahu,
Bob Dylan,
Jack Johnson,
Bob Marley,
Beethoven,
Tinie Tempah.

Favorite Band
 

X Japan :D

Stevie Ray Vaughan and Double Trouble. Their debut album is amazing!
I like Muse's earlier stuff. They totally reinvent themselves for every album, and their latest albums aren't that great.
Rory Gallagher is one of my favourite guitarists.
I listen to a lot of songs by Mike Bloomfield, Funkadelic and Snowy White.

I forgot to mention one, actually. They don't exist anymore, but a band called Crumb released an album called Seconds>Minutes>Hours back in 1998. Amazing album

my favorits music list: AC/DC, Accept, Scorpions, Symfomania, Queen, Manowar. (^_^)