These are three of my favorite openings, ordered in best to least favorite, but are my top 3.
1. Last exile Op. "Cloud Age Symphony" --the best EVER!!!!
2. I Second on ILikeApples5520's Death Note Op 2.
3. Neon Genesis Evangelion Op. "A Cruel Angel's Thesis"
Edit: I deleted the You-tube links because I have suspicion of copyright infringement. If the mods deem it ok, I'll post them at a later date. Thanks.