What are some memorable openings, which are good even without the sound?
Something remarkable, not just running left like in most SoLs or just showing faces of villains.
Black Lagoon's ED.
http://www.youtube.com/watch?v=oAXrRWLKzko << This comes to mind, and for a show I'm watching right now, I'm really falling in love with this one: http://www.youtube.com/watch?v=uGOVty8MgVI
Gatchaman Crowds had a pretty cool one too, but I can't be bothered posting that too.
I love the Kyousougiga opening, both because it kind of hits me in the heart a little, but also for the terribly inaccurate Aussie and NZ on the globe. Hilarious - while NZ is left out on most, this one is made massive and near the equator - they must like us.