I was raised around it but decided to become baptized at 19. I'm in my 40's now. Reason? Life, the world around me, and pretty much everything just made better sense. I feel secure and happy this way, and I like it. I'm plenty open minded, and I've studied other belief systems, but I made a conscious choice that I stick to because it makes the most sense to me.
Some people think that because many of us have left other ways behind that we're fanatical or something- nope, we just found something that makes more sense to us than anything else, and genuinely believe we've found the things most others are still looking for- meaning to life, answers to why things are the way they are, and a secure future.
We're welcoming of anybody who wants to visit and check us out. We expect that if somebody doesn't want to share in our beliefs that they'll probably move on, and that's fine. We aren't about membership, we're about showing people what the Bible says about things.
To that end, we've re-evaluated the Bible without any pre-conceptions, which is why a lot of other religious that believe in things like the Trinity or the immortal soul look at us as heretical or crazy. But, when we objectively looked at the Bible (KJV originally) we didn't find those things, so we don't believe them. Pretty simple really.