Daleks are the scariest monster in Doctor Who according to a BBC poll. They are coming back in the latest episode for a two parter which sees the Doctor out of his depth apparently.
Whist I like the Daleks and the cybermen, it would be good to see the creators trying something a little different rather than rehashing the same villains each series. Its like watching a band and knowing that the most popular tune is going to come at the end.