Has to be The Equalizer - https://www.youtube.com/watch?v=uB1NiNKwueE

Superjail

i hate the show, but breaking bad. i hate it to watch a season and see 22 times the same boring 60 seconds

I'm amazed no one has commented the one from The Walking Dead yet, it's one of the best opening themes on TV shows I have listened to.

A lot of good ones! Denver the last dinozorz: https://www.youtube.com/watch?v=sLlibrF5DRM , Earth Final Conflict : https://www.youtube.com/watch?v=V_zwwQR_z_M Well and a lot from anime that im not going to put because time is gold :o

EPICNESS

I rather like Constantine's theme:
https://www.youtube.com/watch?v=nGW8Lazguis

Stargate - All of them. I enjoyed the show that much that I liked all their intros.

Farscape - https://www.youtube.com/watch?v=DVfIbp-XYSE

Firefly - (can't find the into but here is the song) https://www.youtube.com/watch?v=D7vS4z6ngQo

Lots of others including many others already posted in this thread.

Tokyo Ghoul - 「Unravel」
Bleach - Opening 13
Kuroko no Basuke - Opening 2 (Hengen Jizai No Magical Star)
The opening of Kyoukai no Kanata
... and more :D

This

Garo - 1st opening.
Garo - The one who shines in the darkness - 1st opening.

And because my tastes aren't restricted to Japan:
Earth: Final Conflict
Luther
House MD
(Massive Attack music makes for great soundtracks, who knew ?)
Peter Gunn
The Pink Panther
(Yes, those 2 also share an artist)
Flight of the Bumblebee - originally a part of a Russian opera, made famous in the Western world in the re-arranged version by Al Hirt

Why the hell have I not seen Trigun?
https://www.youtube.com/watch?v=SSX58TglZRs
And it's not like the show is any good, but anyone who's anyone knows how awesome Bucky O'Hare's theme song is:
https://www.youtube.com/watch?v=LyKI1CHPMNw

Black Sails https://www.youtube.com/watch?v=XFTcA4QLHw0

Ulysses 31

How can no one mentioned Handi Quacks?

Cowboy Bebop

Fma brotherhood
Angel beats
Death Parade

And of course THE BEST OPENING EVAH

Hands down Miami Vice for me. https://www.youtube.com/watch?v=CJn7W11xpTs

Here's something more recent I like as well.
https://www.youtube.com/watch?v=F9jFj_VT-r0
https://www.youtube.com/watch?v=ZPn-lTytfGo

https://www.youtube.com/watch?v=UKTNWI0eYJ4

https://www.youtube.com/watch?v=tDMYDC2jjKM

The new show Unbreakable Kimmy Schmidt had one of the best I have ever seen, for its first episode. I think they shortened it for the rest. Link

Angel

Black Sails
^ best Opening of recent TV shows ... (good series btw. just starts "slow")

True blood - https://www.youtube.com/watch?v=vxINMuOgAu8
True Detective - https://www.youtube.com/watch?v=FxXRkqXfhYM

Primeval New World
Les Revenants
Hokuto No Ken - Tough Boy

and an Ending song Stargate SG1

It's a tough one. Considering I haven't been watching much TV lately, but...

Metalocalypse's opening

If anime series count, then Basilisk's opening is probably among the most epic openings ever made

Edit: Also, JoJo's Bizarre Adventure Stardust Crusaders opening