I completely understand this feeling. Completely. I came out as a lesbian a smidge more than a year ago, and I still very much talk about my sexual orientation as my identity.
Lately I haven't been as pressed to come out to everyone, mostly because I'm working as an RA and I need to be sensitive to people who have different opinions/experiences. As in, I can't alienate people right off the bat by blasting them with my sexuality. Also, it's not always an important thing to share in this line of work.
Another thing that made me rethink how I discuss my identity was that I was talking to a man who was very involved as a Christian. We were having a very cool conversation, but I noticed how often he talked about god, and I was kinda like "give it a rest, dude." Then I realized that I work in the fact that I'm a lesbian into almost every conversation, and it made me look at my approach.
I'm still trying to find that line of when it's important to share and when it's not really necessary/appropriate, as well as how much my sexual orientation differentiates me from other people and whether or not that's really important. I'm still workin' on it.