This is a fun tool:
"Check which famous writer you write like with this statistical analysis tool, which analyzes your word choice and writing style and compares them with those of the famous writers.
Any text in English will do: your latest blog post, journal entry, comment, chapter of your unfinished book, etc. For reliable results paste at least a few paragraphs (not tweets). "
Give it a go! I write like Chuck Palaniuk apparently. Not too shabby.