The only dictinctive habit I have that I can think of right off hand is rubbing my ring-finger-nail with my thumb when I am thinking hard about something...that's something I just noticed this summer when making my web site and reading over the pages to make sure they were the way I wanted them before uploading them onto the site...now I notice I do it at school too when I am really listening to the point of a lecture or doing homework.
On feeling the urge to be different or not....No, I already know I am...without having to look like I am.