If I went the Catwoman route it could be complicated. I would go with a mask similar to batgirls above but with cat ears but then there are so many ways to go about it. Do I choose the purple outfit? This is me afterall. Or for some kind of skin tight thing that I can't breath in? Or do i go original? I've seen one costume where she wore a liatard and fake leather trousers then cut scratch/tears out of it. There's so many choices for her and as much as I would like to go as Catwoman I think Batgirl is the better choice... I have a batman t-shirt!
But I do get to have a whip if I am catwoman... Hmm choices choices!