Welcome to the forums. There's plenty of diversity as you say, generally the number of atheists outweighs the number of Christians, but everybody's different and it definitely makes things interesting. It gets heated here, but a great way to have your own claims placed under scrutinity. I hope you get something out of your stay here. Despite heated debates, people are generally quite friendly, of course, stop by Chatter to chill out - great if you do get in a heated debate.
Also, I am an atheist Buddhist from England. I know atheists tend to have a reputation to be humanist (prolly on account of Dawkins being one), but I've found myself agreeing more with the philosophies found in Buddhism, but I am by no means bound by the ideals, I simply adopt the term because I agree with enough teachings to be able to identify with it. I don't buy any of the 'woo' and I don't have to.
You'll prolly encounter different kinds of ideas, though I'd say most of us here are scientifically minded and prefer people's claims to be backed up with something solid to ensure its reliability.