I'm a bit of a sucker for any anime with a good opening (sometimes so much so that I can ignore a mediocre plot for the sake of the 90 seconds before it starts). The anime included on this list are those i deem to have exceptional openings, and it shouldn't be surprising if it includes most of my list. Its important that in most of the anime listed with multiple openings, one is usually significantly better than the others, and its normally the first one. I intend to rank this list eventually but for now its just a randomly assorted collection.
Parallel Hearts - FictionJunction
To the Beginning - Kalafina
Euphoric Field - Elisa