I'm not even close to knowing all the OP listed, but whatever, I just spent 80 minutes to at least watch all of those suggested.http://www.youtube.com/watch?v=LMxPb5eCmT4
- Hakaba Kitarou OP
It's a trippy experience, definitely great. The song and animation work very well together.>>10862602
I'm guessing that "Gundamoo" is Gundam 00 (couldn't tell from your link given that the video was removed)
Zero no Tsukaima: Futatsuki no Kishi - I can't say it was a 'great OP' but I watched it everytime (a few times again for good measure).http://www.youtube.com/watch?v=706WX21dCBY&feature=related
The first ED of Shakugan no Shana. Admittedly, not an OP, but still amazing nonetheless.