Physically, a cute face is the most important thing for both of us.
For me, I like women who are very forward and more on the dominant side. Who doesn't need the man to make every single move for her but just goes for it herself, maybe even messages first, isn't afraid to say what she's looking for. Alternatively, being shy but owning it by clearly addressing the issue. Just flat out saying "Hey, I'm shy/insecure and me acting in way X means I'm feeling Y".
Basically, I like a woman who's not into playing this game where we have to guess how the other person feels about something.
For my girlfriend, she's hugely turned on by guys who are a bit awkward, shy and fumble during the date. Bonus points for blushing or being a bit overwhelmed about being put in a sexual situation.