Y'all Better Help Him Out - Tumblr Posts

So, I've been thinking recently, and I want to start posting some of my writing to Tumblr, but I have no idea what kind of writing I should post. Hence why I am asking for some outside opinions to help me decide.

To clarify, the completely original story option will be a fantasy story I've been working on that I want to publish into an actual novel someday. I currently have two in the works but I don't know if I should post them on Tumblr