Here is a post from Scott aka Cmdr. Clownfish answering basically that question to a new member here!
HA!!! Oh so your full of jokes you'll fit right in with this crowd.
I'm looking forward to it! I've found divers, especially wreck & ccr divers, to have this deliciously macabre sense of humor and I love it. I need to poke around the forums more when I don't have 3 exams and a paper due in the next three days, but i'm wondering what information i'm better off finding on SD as opposed to scubaboard.com (the other diver forum that I read).
Well first off, this board is more of a social area for divers as opposed to the high adrenaline dive dive dive and don't waste my time with anything else style of scubaboard so you can basically be yourself here and not worry about being flamed by 18 people in 5 minutes . That is nice. The members vary from experienced tech divers to newbies but almost everyone gets along. Want to know something? Just ask a question and you'll get fair answers. There are tons of threads already out there. If you'll note... the forums are called Surface Interval because that is basically what its like here. We're just people hanging out shooting the breeze between dives waiting for the next chance to go diving. Some threads are just jokes, some are about being single, and a few are about the superbowl... but most are about diving and generally people are respectful. Just keep in mind that sooner or later all the people that post eventually meet each other in person so being anonymous doesn't really work for long here. That kind of makes the dynamic a little different than scubaboard.
Welcome aboard, personally I'm an engineer and I seem to get along ok so surely a physicist can also. Hey, you might even get my jokes You are off to a good start, thats for sure