Mainly:
Tattoos.
Guns.
Tattoos of guns.
Also:
Politics.
Time travel.
And especially:
Play-fighting. The kind where you feel it the next day.
I think his name was...Poquito Baaaaandito.
Iron Maiden
Dropkick Murphys
Tiger Army
Johnny Cash
Reverend Horton Heat
My favorite locals, The Skells
The Misfits
Rolling Stones
The Who
Bowie
Saves the Day
Pink Floyd
The Postal Service
Devo
Styx
Rush
Journey
The Boss
Thin Lizzie
Boston
Mazzy Star
The Smiths
The Cure
MSI
AC/DC
Guns 'n Roses
Hot Hot Heat
FATA
Billy Idol
Hot Water Music
Horrorpops
Get up Kids
American Nightmare
Converge
Motley Crue
Greenday
The Cramps
Black Sabbath
Atreyu
Deathcab
Wu-Tang
Alkaline Trio
Elvis Costello
Ima Robot
Motion City Soundtrack
Frank Sinatra
Guster
Berlin
Duran Duran
80's new wave
Punk
Rock
Psychobilly
Hardcore
Rockabilly
Hair Metal
Classic rock
Old metal
etc.
Donnie Darko
Requiem for a Dream
Spun
Dr. Strangelove, or How I Learned to Stop Worrying and Love the Bomb
Dawn of the Dead
Boondock Saints
This is Spinal Tap
Anchorman
Waiting for Guffman
Garden State
American Psycho
Rules of Attraction
Saved
Caddyshack
Slackers
Suicide Kings
Memento
I
Breakfast at Tiffany's
The Little Mermaid
One Flew over the Cuckoo's Nest
IT
The Shining
Shaun of the Dead
D2 The Mighty Ducks
Wonderland
Best in Show
Citizen Kane
Ocean's Eleven
Law & Order
Invader Zim
Mythbusters
Strangers with Candy
Monster Garage
Orange County Choppers
Full House re-runs
The Simpsons
Family Guy
Futurama
King of the Hill
The Adventures of Pete and Pete
Mystery Science Theater
Prozac Nation, by Elizabeth Wurtzel
Cat's Cradle, by Kurt Vonnegut
1984, by George Orwell
The Prince, by Niccolo Machiavelli
Anything by David Sedaris.
Pete Lang.
Niccolo Machiavelli.