Top 5 Sixth Year Researcher Syndrome:

1. Writer's block, Researcher's block and Thinker's block are common friends
2. Your average rate of posts on social networking sites increase, you like almost everything posted
3. You get addicted to movies or TV series
... 4. You get immune to Qs like, "So, when do you finish?"
5. You see the humor in statements like, "PhD is a lonely journey".