I was in a Bible class a few years ago where we watched presentations about two young men, probably in their mid-20's, and one preferred to be called a "Christian" while the other preferred the term "Christ-follower." It was interesting to see the contrast between the two perspectives and reasoning behind each.
As for myself, I was raised in church all my life but prefer to never have any outward symbols of my faith in the form of jewelry, bumper stickers, clothes, etc. I might read the Bible at break or write a passage and have it in my locker... but I prefer that people get to know me first and I'd like to get to know something about them as well so that they know I care about them as a person, not as a "God is going to give me credit for this one!" notch on the good old Christian belt.
I started a new job last June; it was several months before I offered to pray with a co-worker, and I just now asked another to church. At my last job, I waited about 2 years after I had formed some close friendships before asking them to church. The first girl I prayed for may not have heard me call myself a "Christian", but when I prayed with her, she was shocked that I knew the names of her children and prayed with her for each of them out loud. This, to me, is what matters, not so much making it known that I call myself a "Christian."
I once read about a man, now in his 40's, who was sexually abused by a priest as a child and he said his most vivid memory was of the gold cross the priest wore around his neck during the abuse. For some people, the term "Christian" and its symbols evoke severe pain and betrayal, not peace or relief. It was reading this very touching interview that made me distance myself from typical Christian labels and symbols... I want people to approach me with a hopefully somewhat neutral view in order to give me a chance to get to know them.
I've also always been interested in the fact the Mordecai forbade Esther to reveal her Jewish background and as we all know, it worked out for a higher purpose. And yet, even though she did not say where she was from, I'm sure her actions are what spoke to people the most. She humbly asked for nothing but what was recommended during her preparation to meet the king, and when she was queen, she had her maids fast along with her for 3 days before she went to speak to him, so I'm sure those around her knew she had strong beliefs.
I don't loudly proclaim that I am a "Christian" but I do tell people I was raised in church and have had a lot of ups and downs. After that, it doesn't take them long to realize that yes, I do have strong Christian beliefs and, while not perfect, try to live them. I want people to hopefully know that I am a real person and that I care about who they are without stereotyping me under a label first.