All You Need Is Kill 1

Since watching the movie was what made me want to read this in the first place, I can't help but compare the two.
While the movie did do some whitewashing what with Keiji's character being made into a white Tom Cruise (bleh), and despite the movie actually having fewer female characters, the movie felt much more feminist to me than the manga. The two female characters in the manga other than Rita were the girl who works in the cafeteria, whose purpose was to appear cheesecake-y, and the girl who designed Rita's armour who was described to us as really smart, and was also a cute-girl archetype (one with glasses and braids). Rita herself is I guess not exactly an example of waif-fu, if you assume that the suits provide much of the power so anyone could use it for strength given enough training and technique, but she still seemed like a waify-archetype. Not that Emily Blunt isn't tiny, but maybe I just wasn't into the archetype of the little girl being an epic warrior. I might have been more ok with it had the other lady characters been less cliche.
Also I found it hard to follow a lot of the action scenes because of the art. I haven't read enough manga to know if it's because this was poorly drawn or if I'm just bad at reading manga! The story seemed to go by pretty quick as well - I wasn't really invested in the ending.

I'll probably read the novella that both this and the movie were based on to see how different it is. Right now, I'm on the side of the movie!