NeutralDrow said:
Wow. I'm surprised no one's mention You wa Shock by now...
You mean "Ai Wo Torimodose," or, as is is commonly known, "You wa Shock."
Note, this was the best quality I could find, so you have to skip the intro. Go to 47 seconds, as that is where it starts.
http://www.youtube.com/watch?v=wFppkEv7Bjg
I actually prefer "Tough Boy," the opening for Hokuto no Ken 2.
http://www.youtube.com/watch?v=5YkNTTrKiOY
Here is the full song (plus "meh" video), because the song is awesome.
http://www.youtube.com/watch?v=KkRDutCC1h4
Anyway, for an action Anime, Hokuto no Ken 2 gets my pick (mostly because of the song).
For a modern action anime, the third Bleach Op, for a slice-of-life comedy, Lucky Star wins (both of these were posted already). For the liscenced stuff, I give it to the Devil May Cry Op ( http://www.youtube.com/watch?v=su7xrBnMPUc ), uh, and that's it for now.
If you want to know what my favorite is to something else, quote or message me and ask, along with a request for the genre. For example, if you want to know what my favorite op to a romance anime is, than you have to specify more (Shonen-anime (not Shonen-ai, thank you very much), Shoujo-anime (not Shoujo-ai, thank you very much), etc). Be specific.