I have a character I made for a TG story where they start out as a male character, and then he changes forms with each level of power used. Level 1 would be himself. Level 2 would be this short curvey brunette girl with a sword. Level 3, would be something like the Shrike from the Hyperion Cantos, and Level 4, would be something like the shrike, but no blades and spikes. Just invulnerable unyielding greyish white skin and super strength, and time dilation.
I used to think that it would be cool to be able to do that, but it was based in my anger at NT's. Oh to be the shrike and destroy anyone and everything faster than an eye blink.
Now, I just picture my ideal form as something that's along the lines of a norse valkyrie(no wings). My geneology was done by both my mother and grandmother to a certain extent and I have a big line going back into Norway. I've always been a fan of the viking/norse mythology and history. The three women I think I would look like or similar to would be Anna Torv, Kathryn Winnick, and Patricia Arquette.