Personally, before the con. I was about the weakest, shy person in the world, but now I'm more outgoing, not afriad of dancing, and okay with being freaky and having people stare at me and give me wierd looks. I even wear ninja gear to school sometimes now.
Ehh, well, I'm still kinda weak.
But I'm not so shy anymore because I was able to walk up to people and talk to them and not feel strange. In the line for pre-reg on the day before, I was talking to some people to pass the time, and said, "This is great, I'm surrounded by a bunch of anime freaks and it rocks." And one of the staff bellows, "YOU'RE SURROUNDED BY A BUNCH OF FREAKS?!?!?!" And instead of cringing and feeling embarassed, I replied, "YEAH! IT ROCKS MY SOCKS!!" And he just laughed, and laughed.
You have to come out of your shell a bit, once in awhile, even if it means moving away from your comfort-zone. Try it next year!