New (random) Idea

I'm new to bloging, but I know what I want to do here. I want to share my personal thoughts about random stuff and for you to comment on it. Let's start with random, what makes something random? Is it anything odd or is it just from nowhere? Is random good or bad? And why in the world do we say "This is realy random, but..." Is it just me, or is random just a way to change the subject?