Well, the problem with believing in god (on the theory that 'since so many people do believe, there must be something to it') is....which one?
Are we to stick with one of the Abrahamic deities or can we go for one of the more exotic ones with blue skin or inner thetans or....mmmm...(dons pirate costume) rich pasta sauce (is eating your deity good manners?)
Keep in mind that the majority of religions state that unless you believe in 'their' very specific variety of invisible friend...then you are going to hell/di yu/naraka/xibalba/jahannam (or whatever.)
Make your choice wisely...or you're gunna burn/freeze/wander eternally/have a bad day at the office (Buddhism is soooooo slack at this punishment thing).
From the CIA World Factbook, the world is roughly...
Roman Catholics 17.33%, Protestants 5.8%, Orthodox 3.42%, Anglicans 1.23%, Muslims 20.12%, Hindus 13.34%, Buddhists 5.89%, Sikhs 0.39%, Jews 0.23%, other religions 12.61%, non-religious 12.03%, atheists 2.36%
Happily, Australia is about 19% 'no religion'.
But personally, I'm backing FSM because of the beer volcano and the stripper factory in heaven.