To me, Catwoman is the perfect woman -- strong, smart, very sexy, and does her own thing. She came a long way from the simple foil to Batman in the early days, and know has a lot of depth and character to her. Out of all the Batman characters in Gotham, Catwoman is the most realistic and compelling to me.
(By the way, I referenced Julie Newmar a lot for this piece, and I have to say, she might be one of the top five most sexiest women on television).