What hairstyle would suit me?

Go shorter. Right now its all big and poofy and not really flattering. I'd say do away with the part, get it cut to about 1"-1 1/2" and mess it up a bit. With the natural curl you have it will give you a natural, good for every occasion style. You can use gel to spike to add coolness points (Though with your face shape i'm not sure if that would be the best idea) And you can comb it down for a professional appearance when needed.