I am on tumblr too! I use it to get my work to the people who wouldn't find it otherwise. The tagging/search works well enough for me. It's not the best tool if you want 100% control over your work and the
copyright. But that's always the problem on the internet. Feel free to "follow me" if you have a tumblr too.
I might upload some random doodles in the future. So watch out and enjoy.