Samantha - Classic, can't go wrong with it.
Lily - SUPER popular in my area, it's just ok to me really.
Leah - I haven't heard many girls named this, it's super cute!
Hannah - It's just OK to me, nothing special
Hazel - Super cute, unpopular, unique
Sophie - It's alright.
Zoey - Cute, somewhat popular
Layla - very feminine, cute
Kayla - Very cute, similar to my fave name Mikaelyn
Roxanne - super cute! love how it's not overly used but still close to the ever-so-popular "Rose"
Hayley - I like it but prefer spelling alternatives such as Hailey, Haley, etc.
Raven - It's nice and unique but not sure I'd personally use it
Millie - Mildred/Millicent would work much better and nn Millie
My fave out of your list would be Leah, actually. Otherwise I'd prefer Mildred w/ NN Millie.