In my circle of friends I've always been loud and funny and talkative. But as soon as I step out of that circle I get very quiet and introspective. I don't want the spotlight on me.
It's very important to write things down instantly or you can lose the way you were thinking out a line. I have a rule that if I wake up at 3 in the morning and think of something I write it down. I can't wait until morning - it'll be gone.