not sure how many people on a bleach forum would like metal but uhh O_O.

Heres a list of good bands.

Protest The Hero
Alesana
All That Remains
Special Mention is Evil-Dog. He's not famous or anything but makes great punk music.
Fall Out Boy
Foo Fighters
Gorillaz
GREENDAY!
Gym Class Heroes
Halifax(though i only like one song...)
Hawthorne Heights
I Set My Friends On Fire(Warning uber Screamo o.o)
Linkin Park
Lost Prophets
Motion City Soundtrack
My Chemical Romance(Stay away from them live O_O)
Some of The Offspring like Keep em Seperated and Pretty Fly. You might actually notice the song from something. PRETTY FLY FOR A WHITE GUY!
Panic! At The Disco
Killswitch Engage
Paramore(Good band with a girl singer)
Red Hot Chili Peppers
Red Jumpsuit Apparatus
Rise Against
She Wants Revenge
System Of A Down
Taking Back Sunday
TENACIOUS D!
Underoath
The Used
White Stripes
Wolfmother
Yellowcard
AFI(old music of AFI)
ATREYU!
BEASTIE BOYS!
AVENGED SEVENFOLD!
Blink 182
Bloodhound Gang
Coheed And Cambria
Dragonforce if you wanna hear some crazy guitars