Pop Punk:
Green Day
Blink 182
Sum 41
The Matches
NoFx
Rancid
Love & A .45
A Day To Remember

Psychopathic:
Insane Clown Posse
Twiztid
Blaze Ya Dead Homie
Boondox

Thrash:
Municipal Waste
Slayer
Evile
Exodus
Anthrax
Pantera
No Mercy
Lamb Of God

Death/Black Metal:
Satyricon
Martyr Defiled
Abigail Williams
Black Dahlia Murder
Whitechapel
All That Remains
Decide
Cradle Of Filth
Summers End
Job For A Cowboy
I Killed The Prom Queen
Chthonic
Carniflex

Metal:
Ministry
Sepultura
Soulfly
Avenged Sevenfold
Lacuna Coil
Slipknot
Stone Sour
HED(pe)
Iron Maiden
Dragonforce
System Of A Down
Serj Tankian

Hardcore/Punk:
Minor Threat
Black Flag
Bad Brains
Dead Kennedys
Sheer Terror
Agnostic Front
Random Hand
Suicidal Tendencies
Converge ..

All These genres mean the most to me
I like so much more though just these are the few that sprung to mind.

Bands Ive Seen Live:
The Misfits
Blitzkid
The Black Dahlia Murder (x2)
Carniflex
The Faceless
Agnostic Front
Big D & The Kids Table
Random Hand (4x)
Exodus
Evile (x2)
Zombina & The Skeletones (x2)
Iron Maiden
Love & A .45 (2x)
Discharge
The Peacocks
The Computers
Scourge Of The River City
The Briefs
Spit Like This (2x)
Dragster
As The Righteous Fall
Farewell City
Dividing The Line
Sonic Boom Six
1000 Hertz
The Rabble
Time Has Come

And So Many More I Cant Remember