Ms Plec posted on her Twitter account @julieplec the message: "I can't decide who I love more this season. Katherine or Silas. They're both just such d**ks. #TVD" to which Nina responded with: "Bad is good. K is the baddest,Duh." Nina Dobrev returns with her double characters Elena Gilbert and Katherine Pierece in "The Vampire Diaries" Season 5 that airs every Thursday night."Vampire Diaries" fans are still hoping that Ian Somerhalder and Nina Dobrev will get back together, but the 24-year-old brunette beauty appears to be enjoying the company of another guy right now. Ms Dobrev was spotted getting cozy with "Dancing with the Stars" professional dancer Derek Hough at the Roosevelt Hotel in Hollywood.