I've had some people ask me about this.
The short answer is: Yes. Reposting and sharing stuff from my gallery on Tumblr and similar social networks is fine. More than fine. As I believe I've stated before, I'm not drawing for money, nor for fame. So - share whatever you like. If you're happy, I'm happy, we're all happy - and the world's a better place.
The longer - and somewhat more boring - answer is: Yes, but I'd appreciate credits. And - when the artwork is not entirely mine (Photomanips, colouring of other peoples lineart, etc) - please ask the respective owners and copyright holders before posting or sharing!
(Am I the only one who do