Personally, I prefer the more silvery Black Pewters compared to yellow Cinny Pewters. But I still appreciate a beautiful Pewter.
Pewters shouldn't have squiggles in the alien heads as that is a characteristic of Black Pastels.
I think the alien heads should be clean and connected. I like eye spots on them with a bold outlining. The backs should be fully blushed out from the Cinny gene. I don't really care for any pattern or striping on their backs. Black back pattern is the way to go.
A smooth look to them is always good. I'm not a fan of any wavy, rough, granite look.
In the end, like everyone always says, it's your preference. If you like her, that's all that should matter.
Can't wait to see your girl.