When I started therapy, I was rarely emotional. In fact, I was extremely stoic -- for years. It wasn't until my last therapist that the tears really came. I don't remember the first time; I just know that crying came more easily and more often with my last therapist. I don't think it had anything to do with him; I was just in a different place by that point. I cried A LOT. I was a wet, snotty mess sometimes. A bit embarrassing maybe at times, but any embarrassment was eclipsed by utter emotionality. It didn't seem to bother my therapist in the least, so it just became part of what happened in therapy for me.

I guess I'd say don't worry about it. If and when the tears come, they'll come. I don't think they are a requirement. The bigger issue is whether you are opening up to your therapist and working on the matters you feel you need to address, or are you stuffing things down to avoid the emotions. You might just try talking to your therapist about that in itself.