So as much as I love a series and the characters created to make them interesting. I usually have always loved the worlds built in a series and would love to see an rp plot made from one of these worlds.

I would love to see an rp made from the idea of these series, not based on the plot directly.
~Gurren Lagann
~Avatar (Airbender or Korra)
~Avatar (I like the tech and mechs, what can I say?)
~Code Lyoko
~Lost Planet

Pretty much most tech or future based kind of series really.