She aint naked if you cant see the important bits.
I'm using Yuna for a reason actually... She's got one blue eye and one green. The story behind the character is that she's a "chimera" - a person who has two different strands of DNA. Yuna is hot, and she fits the character description I already have a story written for. So what if everyone recognizes her? :P
Yeah, really. Orginality is fine, but as long as the character suits what you need, why not? But, if its just the eyes and you want something that few people recognize, go find it and post it here. I'll do the eyes.