Dark type is my favorite, but I think I'm more of a water or fire type. I usually go with the flow, but once in a while I get pretty fired up. I have red hair and my favorite color is blue.
Fairy/Dark; actually I was pretty disappointed that Zorua didn't get that typing in X & Y. It would fit a style based around tricky illusions pretty well.
That is hard because their is so many good type combinations, but i think i would say a dark/fairy. It would be interesting and it would have 3 weaknesses.