There are two openings that I personally like a lot, they're in PT-BR (best version IMO).

Saint Seiya:

Dragon Ball:

So I have quite a few, and I'm sorry I can't provide links, since they'll probably get taken down again and what not. But I'll provide a list of animes, and it's a bit all over the place so bear with me~ unless I specify, I mean all openings

 

Mirai Nikki

Deadman Wonderland

Higurashi no Naku Koro Ni & Higurashi no Naku Koro ni Kai

Umineko no Naku Koro Ni

Phantom ~ Requiem for the Phantom [the ED is also very good]

Rozen Maiden [All series, there's quite a few sorry ^^;]

Bleach OP 2&3

Naruto OP 4

Hanasaka no Iroha

Ao no Exorcist

Pupa

Akuma no Riddle

Hamatora & Re:Hamatora

Diabolik Lovers

Vampire Knight

Madoka Magica

Tasogare Otome x Amnesia

Hidan no Aria

To Aru [index, Railgun, so on and so forth]

 

And that's all for now, I think they're all excellent and quite a few haven't been mentioned yet~

For me this is the best :Heart-eyes:

 

[bbvideo=560,315]https://www.youtube.com/watch?v=jn64ePioCqA[/bbvideo]

Gigiotelli9 I was about to do the exact same !

 

I really like the No game no life opening

:Angel:

 

(can't post links yet unfortunately :Nervous: )

for me this 3 opinings are the best i ever see

 

https://www.youtube.com/watch?v=ngxBe1vmDGA

 

i don't know...those 3 are just...something out of this world and your mind blows away xDDD