All wise cracks aside, more than likely nothing... most people don't really get to see that much off the bat. Break the ice, and well... Eclectic is a word that comes to mind.
(Charles Sheffield's "The Spheres of Heaven" is the only book I own.)
Movies - Nightmare before christmas, Marvel, DC, Chris Farley movies, Sherlock Holmes, Hayao Miyazaki movies.
Shows - hmm... Doctor Who, YuYu Hakusho, Cowboy Bebop, The Flash, CSI, NCIS, Law and Order: SVU.
Music - Game themes, Rock, 80's, 90's, 00's Alternative, Classical, etc. (Not a fan of "Screamo")
Games - Most everything.
This list is probably the hardest to narrow down. League of Legends, Zelda (as well as most other things Nintendo), Bioshock... I'll stop there. :P
What an ideal partner would be like. Honestly, perfection, for me... That's someone who can share interests along with the ability embrace me for being me, flaws and all. Mutual commitment, trust, and fun. The rest should follow.