I am an open atheist because it is important for people to know that atheists can be good people, and I try to be an example of that. If we are more open about our views, more people will feel like they can come out as well without being judged.
I don’t get in people’s faces but:
I would join a march.
I would be in a debate if asked.
I have a bumper sticker that announces to all that “I am going to hell in every religion”
I try not to inflame reactions while not backing down from argument.
I try to keep a sense of humor.
Living in the bible belt where it's hard to throw a rock without hitting a church, I'm still in the closet to about 80% of the folks around here. My parents weren't religious and didn't go to church except for funerals and the odd wedding. My maternal grandparents, however, were Fire Baptized Holiness and church services my Granny took me to as a child scared the crap out of me. Kids around me were being scared into belief. I was lucky and got scared skeptical. Most people I knew were fairly smart and logical on everyday things but when it came to religion and their god, those same people were dumb as a sack of rocks it seemed. Logic was out the window. I learned that if you ask too many questions in church, you don't have to go to church anymore.
I'm an open atheist.
I remember as a small child sitting in Sunday school and thinking, "They're making all this stuff up just to trick us small kids." However after hearing that my parents and grandparents believed it, I spent years trying to believe and was convinced I might go to hell because I had doubts. This sort of brainwashing is an awful thing to do to any child.
I'm open with everyone, all the time. It got exhausting to hide, and when I grew up and had my own life going, I didn't really have a reason to. I've lost friends and my relationship with certain family members has suffered somewhat, but I reached the point where I was willing to take that risk in order to be my authentic self. That sounds really douchey (I can't believe I just said "authentic self"...wow) but that's my story and I'm sticking to it.
I am open about my beliefs. I believe in the scientific method and evidence based reasoning. Being confrontational with believers is not my style, unless I am being confronted or someone tries to dictate how things should go based on their religious dogma.
Loud and proud. I get nasty looks from people when I walk around with my I DON"T BELIEVE IN GOD! T-shirt. I get stopped from time to time and asked, why do you advertise my Atheism, it's obnoxious. You got to love how hypocritical they are, and it's a little sad they can't see it. I had one person ask me why I wear an Atheist shirt at the same time she wore a shirt that said "Believe" in cursive at an angle across her chest. I had to point out the hypocrisy.
I'm not totally open in the sense that I don't generally announce it. When asked I'm not hesitant to state my views.
I get to "cheat" a little bit I suppose. When around fundamentalist Christians I can honestly say that I'm "Jewish/agnostic like my father before me and his father before him.
The "Jewish" bit give me a little leeway as most fundamentalists tend to respect Jews.
That last bit may well be changing what with Trump's friends giving the Nazi salute while chanting anti-Jewish slogans.