I assume you mean TV, movies and books? I'm obviously a big fan of Star Wars (ep IV - VI), Alien& Aliens On the TV front I liked Firefly & BSG (I even liked the original BSG!) bookwise on Sci-fi Asimov (Foundation), Larry Niven (Ringworld), Ursula K Le Guin (Left Hand of Darkness). The Forever War (Joe Haldeman) was a big inspiration for Wing Commander