TL;DR: I enjoy doing research and writing about it. More details on LinkedIn.
I've taken up the task of learning as much as possible about digital forensics on my own time. My particular focus and interest lie within behavioral analysis of user activity/malware artifacts. Discovering the process by which a user interacts with a computer could be a key determinant in the prosecution or defense of a guilty or innocent individual -- I'd say that's a pretty big deal, wouldn't you? Accurately revealing the truth about an event has the potential to directly or indirectly affect the well-being of an individual or the community as a whole. From this simple fact, motivation flourishes.
I may write a little bit more about myself here, but if you've got any questions in the interim, feel free to @reply me on Twitter, add me on LinkedIn, or email me. For now, I'll be posting anything that others might find useful in their investigations. I am by no means an expert; there is always more to learn. But I will contribute where I can.
I also run /r/4n6k on reddit, so come check that out.