Best Anime Opening/Ending Themes

Have you ever had a song stuck in your head?  Like a broken record playing over and over and over even while you're sleeping?  And you suddenly start humming, or even worse - singing, the song at random moments during the day involuntarily like muscle twitches?  That's what anime has done to me, but in a good way.  That's why I think all anime shows should be required to splash this message in big bold letters before the start of the opening theme:

WARNING: 
Watching too much anime can cause JPop/Rock/Hiphop addiction.

It all starts out quite innocently.  You hear the anime's opening theme and don't think much about it because you don't understand Japanese.  Then you start noticing how awesome the video sequence that goes with the opening theme is.  Then you realize that the music is a perfect fit for the anime you're watching.  Pretty soon you hear the darn song in your head every time you see the anime's main character.  Then you just have to look it up in YouTube because you're curious to see the artists behind it.  And then you find the video to the full version of the song and that's when you're hooked.

Well, that's how I got hooked anyway. :D  You know... why don't you try it?  You might like it. ;P  I'll even point you in the right direction.  Here are a few of my favorite anime opening/ending themes right now:  (By the way, don't mind the incomprehensible English lyrics, a lot of them are incorrect. Hehe.)


Howling
Abingdon Boys School
Darker Than Black Opening Theme 1



The World Without Logos
Yasushi Ishii
Hellsing Opening Theme 1



Mosaic Kakera
SunSet Swish
Code Geass Ending Theme 2

Driver's High 

L'Arc-en-Ciel 

Great Teacher Onizuka Opening Theme 1

Asterisk
Orange Range 
Bleach Opening Theme 1



Shiki No Uta
Minmi
Samurai Champloo Ending Theme



Changin'
Nona Reeves
GetBackers Ending Theme 4


Now go look for the full version original artist videos of these songs on YouTube and you'll be a bona fide certified JPop/Rock/Hiphop addict. :P