You have me there, I have built up some real stinkers in both plastic and resin.   For the contest I will not pick a stinker of a kit.

I have some really good resin Babylon 5 kits, Star Wars, and Star Trek kits.  

In plastic, well I have a small store selection when it come to Sci Fi.....But I would like to stay to these subjects:

Star Wars

Star Trek

Ma. K.

Or something from Anime like Captain Harlock, or Starblazers

If I go the diorama way, I can do a Gamara dio

The Minions from Despicable Me

Or castle Neuschwanstein (Yes I do have a plastic model of this)