As the title say, it can be opening from whatever shit you wants, an american serie, anime serie, a game, etc.
If a thread like this already exist, sorry, I didn't found one in the search
Steins;Gate has one of my favorites. The music and visuals when Kurisu is on screen always make me think of Neo in the Matrix saying, "We're going to need Kurisus.... Lots of them".
Anyways, Xamd is one of my favorites
Toriko: I get the feeling that one is supposed to be really cheesy and sound like an 80s power rock song. 10/10 for totally accomplishing its goal but the song blows to me and I'd skip it every time. 5/10.