I like this a lot. I was worried about getting into the dating scene again and figuring how to flirt. From everything I read online I was a little nervous.
One thing I enjoy is a woman's earrings. I commented on a woman's big hoops ones at the sushi shop the other day and she invited me to sit down for lunch. I had a lot of work so I declined but I genuinely enjoyed her look. Her hair is another if I really like the colour or style. I like this one woman who as a green streak in her hair in the front and I say it looks cool.
At the gym, someone in the lane was swimming super fast and I commented on that while we were taking a break at the same time. She responded with "how was my posture?" and I got pretty shy on that comment. I didn't know what to respond with.
I like to compliment and if it comes from the heart I don't think the woman minds. Be appropriate though in your timing.