Avoid a crown that boxes you in. A round or square face requires a taller crown to lengthen the appearance. The eye perceives that line as continuing and adds height. Accent vertical lines, and you might also try to angle the brim when wearing.
A longer face shape would call for a wider brim and shallow crown. Think balance. Accent horizontal lines for width or a shortening appearance.
Lucky you...you can wear almost any style! Now you have to fit your color, mood and attitude.
If you want to send Rose a picture of your face, and even your full body, she can provide ideas of hats that will best fit you.