This is definitely my favorite server. It has some great OP's and rarely do you have to worry about having your creations griefed, even in the guest worlds, because either the OP's will be there to undo it or if it won't work they'll give you their time and help you rebuild. It also has a wide variety of worlds, including multiple arenas (CTF, Zombie Survival, Spleef).
I'm just upset right now because it's been down all day. I think people should get twitter accounts for their servers and post whenever it goes up or down so people like me don't have to keep getting on it to check.
thanks all for the kind words about my server! i apologize for the server being down. i've been having renovations in my house and as a result, my computer's been disconnected. on top of that, i've been sick in bed for a few days so..... it's been hectic. anyway, the servers back up now, or it should be. so enjoy!