For once?!  Hey!  Ahhh anyways, lol.
Yeah, I recommend you listen to, in order:
Testament:  "Alone in the Dark"
standard classic thrash =)
Iron Maiden:  "Hallowed be Thy Name"
roots man... roots
Megadeth:  "Lucretia"
more technical thrash sorta stuff
Black Sabbath:  "Snowblind"
MORE roots
Carcass:  "Heartwork"
suddenly the hard growling invasion
Sepultura:  "Propaganda"
speeeeed
Death:  "The Philosopher"
Just cuz!  Tech/heavy
Rush:  "2112"
dont even ask
Kansas:  "...Wayward son"
Slayer:  "Seasons in the Abyss"
Meshuggah:  "Future Breed Machine"
Symphony X:  "The Edge of Forever"
Savatage:  "Hall of the Mountain King"
In Flames:  "Jotun"
Bach:  "Toccata and Fugue in D Minor"
Therion:  "Rise of Sodom and Gomorrah"
Mozart:  "40th Symphony"
Dark Hall:  "Dark Hall"
jazz it up!
Anthrax:  "Im the Man"
Nevermore:  "The Learning"
Opeth:  "The Moor"
Pink Floyd:  "The Wall"
Soilwork:  "Neurotica Rampage"
Queensryche:  "Suite Sister Mary"
and to end it all on one weird note
Bad Religion:  "Suffer"
=).  Listen to that shit, and you'll come out with your head full of a shitload of different styles.  Throw in some more jazz, folk and prog if you're truly silly.
J