These are my list so far

http://www.youtube.com/watch?v=EgATlhZFAfs
Neon Genesis Evangelion

http://www.youtube.com/watch?v=CvQyJKBfLro
Eureka Seven



http://www.youtube.com/watch?v=R7Gqm53Rwts
Shin getter Robo (Opening 2)

http://www.youtube.com/watch?v=1w9UX_ZxAmA
Gaogaigar

http://www.youtube.com/watch?v=8A8dWlaGbnw
Gundam Wing (2nd opening)


http://www.youtube.com/watch?v=6rtQbpwmG8I
Dragonball Z

http://www.youtube.com/watch?v=e2n59dI5RUQ
Dragonball Z (2nd opening)

http://www.youtube.com/watch?v=Z6P4G55GUsg&
Gundam Wing Endless Waltz (amv)


http://www.youtube.com/watch?v=zWni1axG_Eg
Gundam Seed

http://www.youtube.com/watch?v=BJsnpiDyj9U
Gundam seed Opening 3

http://www.youtube.com/watch?v=umQw4r7g_Tc
Naruto (2nd Opening)

http://www.youtube.com/watch?v=Ox7Q-N6-3fY
Naruto (opening 4)

http://www.youtube.com/watch?v=xUBO1Z8jf0Q
Initial D (1st stage)

http://www.youtube.com/watch?v=rjLHBq0gjgU
Initial D (2nd stage)

http://www.youtube.com/watch?v=MYMTwASBfUw
Initial D (3rd Stage)

http://www.youtube.com/watch?v=WjmoQsiVy5k
Initial D (4th stage opening)

http://www.youtube.com/watch?v=XAAB5A2ZBaU
Hajime no ippo

http://www.youtube.com/watch?v=xp84Fri4xBM
hajime no ippo (2nd opening)


Oldies Anime Intro

http://www.youtube.com/watch?v=RIPm7sdbD88
transformers (japanese version)

http://www.youtube.com/watch?v=2klGYUBeIu0
Transformers Headmasters

http://www.youtube.com/watch?v=8TSVL_5r2eU
Dancougar

http://www.youtube.com/watch?v=aVt4DAIOP00
Double Zeta Gundam (2nd opening)

http://www.youtube.com/watch?v=WTra3cs3Z9c
Zeta Gundam (2nd opening)

http://www.youtube.com/watch?v=Px2zX-M2alQ
Saint Seiya

http://www.youtube.com/watch?v=BdaDgiONca0
Aura Battler Dunbine

http://www.youtube.com/watch?v=-bndgraJkfU
Combat Mecha Xanungle

http://www.youtube.com/watch?v=-4WCRToOboI
Voltes v

http://www.youtube.com/watch?v=wVHJ0Xs3Fcc
Daimos

http://www.youtube.com/watch?v=G_8bQgGjJqI
Mekanda Robot

I like the 2nd opening of Naruto

pero the best talaga ang Opening Soul Eater

OP of Macross Frontier
OP of Code Geass
OP of RV capu2 and Kannagi
EP of Fate Stay Night (just wanted to add)

Gun X Sword
Eureka 7 intros
Bleach - Asterisk
Samurai X
Bleach - second intro
Gundam Seed

To-LOVE-Ru Opening!

Bleach - Afterdark
Hayate no Gotoku - First opening
Air Gear - Chain
Gundam 00 - All openings including second season's
FMP - Tomorrow, Minamikaze and Sore ga...
GTO - Driver's High
FMA - Ready, Steady, Go and Link
Lucky Star - Lucky Star
Initial D - Speed Lover
Dragonball Z - Cha La Head Cha La

Too many to name but recents are...

Rosario+Vampire Capu2
To Love Ru
Ikkitousen DD
Lucky Star
TTGL

in no particular order:

Macross Frontier
Elfen Lied
School Rumble
Lucky Star
Basilisk
Hunter x Hunter
Chibi Maruko-chan

nice topic!

my faves are:

Hunter X Hunter 2nd Opening - ryodan!
http://www.youtube.com/watch?v=9_nZoQeE76Q

Vision Of Escalfowne - fantasy
http://www.youtube.com/watch?v=LfLskTpT6I0

Time Quest Opening - crazy
http://www.youtube.com/watch?v=fPNUVTWCerc

Naruto 2nd Opening - loud
Daimos - kick@ss robot intro