I don't mean sexually, I mean generally, something you notice the other side doing. It doesn't necessarily have to be the best thing but maybe something weird/ or funny possibly bad.
Favorite part about them generally for me would be their caring, really make a guy feel warm inside, that feeling not even same sex best friend can give.
Favorite part about them if I didn't know the person would be their hairstyle, shows if they care about their look when they walk out their house. (Not just girls but guys too I mean)
The whole "pack" thing. You always go places in groups, never alone. Even the bathroom, its odd but its something I only see females doing and so its intriguing.