I've gone through the end of both spectrum, from totally out and in your face, to totally closeted, OMG yes I'm straight, no, never think of boys that way. neither one felt very comfortable for me. I finally came to the point where I decided that aside from who I find attractive, there really is no difference between me and a heterosexual. So why should I act any different? I don't hide the fact that I am bisexual (with one exception), but I don't exactly flaunt it either. It isn't something I bring up in every day conversation, not because I'm trying to hide it, but because there is no reason to bring it up. If asked by someone (usually because they notice me looking at some guy or something) then yes, I tell them that I am bi, but I don't make a deal out of it, just kinda shrug it off like "yeah I am, so what". But it is what I found myself most comfortable with. I don't question why I should or should not tell someone, and I don't think of it as hiding it from anyone. The only real change I've made is I generally prefer to use non-gender specific pronouns when referring to who I am dating, such as (my personal favorite) "the other half" or "my other half". I'm not sure why, it's just something I tend to do.

(as for the one exception, that would be my mother. That is only because I have found it so much easier to leave it at I'm gay than to try to explain the whole bi thing to her. not quite sure how exactly that worked out that way, but, well.... what can you say)