Same for me, according to the chart I'm a Capricorn. And according to your description as well, it does seem to fit it a bit as well, yes. ;o;
I know someone who seems to have a similar personality to me that fits your description even more (She was born in December 2nd) however so...
I don't really know much about this 'Zodiac' stuff, just letting you guys know. I have looked it up a couple of times, like tests about myself and other stuff but. //shrug//