I guess my biggest and greatest hobby is chatting online.
I love chatting with different people around the world. For me, it's easier to converse with millions of users on the WWW then speak with a big group of people that's staring at you.... forcing you to respond to them if they ask you a question or if you need to give a speech to them....
What I HOPE is that my chatting on forums will encourage me and inspire me to do what I used to do by myself with no one to look and respond to...writing stories or essays for school.

I can't wait until my senior year, when I get to write that wonderful thesis!!! YAY! (Not)
Actually I don't think I would find it that much, but I may also.

So, WRITING in general, but mostly chatting online is my greatest hobby for me.