Stories in your head?

Hello everyone!
I thought I'd start doing more journals here on deviantart, and a question popped into my head! Many of you probably have stories in your head, possibly characters and worlds you've never really told much about or just keep them to yourself? Something you'd hope to write a book about, maybe draw a comic or something like that? Do you know what I'm talking about?

I myself certainly have many stories and worlds and universes in my mind. These three here are good examples, they're probably the biggest and most complex stories I have (I have others too though):
I personally try to bring them out by drawing, but I've also written little texts about them, especially from my story "Niittäjä" (=Reaper) - almost... f-five pages, woo (shhh that's a lot for my laziness)... 

I should draw more of them, and I want to, too! Personally I reeeeally like to see other people's characters and stories and original creations, and I believe others think that too! So if you have some stories in you mind, don't be afraid to put them on paper and show to people!
So, as I asked, do you have a story or two in your head? If so, what are they? Do you have pictures of them in your gallery? Are you like me and you keep getting new and new ideas for characters and stories even though you already have more than enough to start with, khaha?