That's a good point! We do leave little bits of ourselves in our work, and that's probably a good thing - otherwise, there wouldn't be nearly as much variety in fandom! (I just haven't found the right way to make those particular hobbies work, I guess. Someday! :D)
Truth to tell, I'm absolute pants at guessing what authors write what when their name isn't on it unless the style is REALLY unique to them. *giggle* For this reason, I don't tend to muck around in the "can you guess what I wrote for [x fest]?" type posts on my friends list. But I do like the thrill of learning that a fic I liked in a fest was written by someone whose writing I enjoy!