Your biggest turn on

[Nullifidian]

In order:

Face (Not necessarily a "beautiful" face or whatever, as long as there is something unique and cute about the face. Can be either eyes, nose, lips or something else)
Shy and reserved at first, but passionate and bit naughty too
Intelligence (Constant boring conversations about how shitty her job at the supermarket is, no thx)
Slim body
Geeky
Redhead, brunette

Bonus if she has:
Nice feet
Stockings
Skirts
Tattoos/piercings (except for the trashy stuff like tramp stamps etc)

I could name a bunch more but too lazy