I'm going to vote slightly tactically here - something I haven't done in any of the other polls - because Lex and I are currently in a tie for first-place, which I think is pretty much perfect, so I'll give some extra recognition to some other people.
Tets has been our "first responder" on a couple of occasions, getting breaking news onto the front page as quickly as possible, which is important for drawing in visitors.
vaderSW1 only joined us this year and already he's cemented himself as our regular podcast host. I felt like I had been banging my head against a brick wall trying to change the format until he took charge of it.
JasonTandro has been one of our most active writers and is always full of interesting opinions on the podcast. He's showed a lot of enthusiasm for his new role, which bodes well for the future.
Finally, Pixel has produced a lot of excellent audio and video content for us. Despite our creative differences, I think he's very talented and I wish we could work more productively together.