I like Supergirl. She is a fun character. I have always seen her as someone who just LOVES being a superhero, the action, the adventure and of course: helping others. I miss that with superheroes, especially the last one.
My take on the character owes a lot to the silver age, especially the first appearance of the Kara Zor-El character in Action Comics #252. Due to a colouring mistake, Supergirl appears to have blue leggings, as opposed to her bare legs. But, this is actually my favourite look for the character, I just added a red skirt for balance.