Side note, I find it interesting (and cool) that the majority of trans folks here are of the ftm variety.
Anyway, mixed feelings for me.
If I had the hypothetical chance of either just "magically" becoming female, or being born a woman I would probably take that without any real question, but as-is, the costs (monetary, physical, emotional) of a full blown transition just don't outweigh the benefits for me. So I'm non-op by choice, with a supportive and pretty all-around cool partner. Which is great, but sometimes the dysphoria can be uncomfortable and a bit overwhelming.
But being trans has definitely given me a different perspective on things, opened me up to a whole community of people, and allowed me to really examine who I am and what my gender and identity are really all about.
I probably lean (just slightly) to the happy that I'm trans side of things, but there's no doubt in my mind that life could be a whole lot easier and less stressful if I didn't have to think about gender like this.