As everyone's said, all the banners are well put together, so I think everybody should be congratulated.
Though I submitted some myself, my favourites are the ones made by Jochen G. They're visually engaging and put across the message that EAS is a Star Trek site without relying on the sort of imagery you see in most banners for Trek related sites. The only thing I'd change would be the font for the website name, which isn't really legible enough.
Darkstone's ones are good, though I don't think the glow around the letters is such a good idea. It makes it eye catching, but it's not as easy to pick out what it says if you're scrolling down a page. My main concern with these is that they use other people's artwork(unless Darkstone is a member of the Light Group, I don't know..). One of the main gripes among the fan art community is seeing their work used without their permission or without being credited. The edited star logo looks great, though.
I like the font Ottens has used in his. It's nice a fresh and simple and it's easy to read even at smaller sizes. The images are good, though I think one is by Greg Martin.
My own ones... I tried to keep a uniform style that might help build up an awareness of the site. I changed the font to one that's similar, but doesn't carry the connotations associated with the TNG font, so EAS has a separate identity while still having a strong relationship with Star Trek. Lastly, I used the official blueprints of the title ships, the larger the logo having a larger ship. See if you can guess which is which.
The last banner is a different idea, just playing off the "from the stars, knowledge" idea.
Anyway, this is my first post*, so I might just abstain from voting. Doesn't seem right to come on here just to vote for myself.
*I had another account long ago on the ezboards version, but I can't access the email for it.