More of new-age / eastern spirituality. Cuz its all about meditation and attaining nirvana. No big meanie God to thump the Bible into his head. And no angry hopeless world view that this world is all there is and you are just like any other animal.
(um... look at the Bible deeply enough you find out that new age / eastern spirituality seems to miss out on something... *sigh* all these angry preachers make God look like a dictator...)
Haven't you've seen propaganda everywhere all over the internet? People have opinions. Only a few people send missionaries to third world countries because their religion requires them to do so. Hence there are a shit ton of Christians over the face of the Earth.
If I recall the statistics on this, Islam and evangelical/charismatic Christianity top the list as far as rate of growth in past decade. Actually, if I recall, Mormonism is somewhere up there too. There are also an increasing number of Americans identifying as no religion in particular. I'm too lazy right now to Google it, but you should be able to find this stuff on the Pew Forum website. Specific to the US, obviously, but I know there are international surveys as well.
There are no sects in paganism and there isn't a universal pagan religion. Like ~dragondemon53 said: "paganism" is a blanket term that refers to non–Abrahamic religions in general and you have a diverse range polytheistic, pantheistic, animistic, and shamanistic belief systems that have all been referred to as being "pagan" at one time or another.
My parents were born in China, their system of belief and morality is based on Chinese society. I was born in Canada, for the most part my system of belief and morality is based on Canadian society. We are both atheists. For examples I have many atheist friends who take up issue with my stances on marriage, abortion, feminism, pragmatism, worth of art, foreign affairs, politics, and philosophy, yet we're all atheists.
Atheism is simply a philosophical position on the existence of God, nothing more nothing less. Holding a position of theism doesn't necessarily mean that a person ascribes to a particular religion, so why should it work the other way?
Also, since you insist that atheism is a religion, could you maybe give me a rundown of rituals, symbols, metaphysical positions shared by all atheists?
Atheism has no system of beliefs or morals. It is simply a lack of belief there is a god. No two Atheists are going to have the same beliefs or moral system. Therefore, it is not, and cannot be a religion.