Give me some idle time, a web browser and Photoshop, and see what I do to other people's creations. These come from original images at archives on the web, presumbably done by the companies/creators etc of the series, credit for those images goes to Gainex, ADV, etc. Sorry they're so huge- resizing doesn't do them justice. They make good wallpaper though! ;) If you do want to take them, please email me.
Original images on the left, my adaptations on the right.

This is one that I made of a character in a fanfic I was writing- her name is Mari. Yep, this is from a famous pic of Asuka that I reworked in Photoshop.
Evangelion - New Testament

This is one I made for someone else's fanfic, they described the character as having Rei's coloring with Misato's features- Kami. This is from another popular Eva picture of Misato that I repainted in Photoshop.

This one is just "plain old Asuka" Ha! It's just a wallpaper I made for myself. I took an image of her with an angry expression and replaced it with a happy one, and added her feet because they were missing. I also lowered her skirt so it would be a bit more modest. Then I combined it with some text and a lighter background of her piloting. I like the effect.