You've got a great smile! I think you should put one of the smiling shots as your profile pic as I think it's a great asset. Just my opinion, but I think your personality shows in those photos, which is great!
I agree with what Nixie has said. You've a great look, and in all of your photos, you've interacted with the camera well - mainly with good facial expression and eye contact. The one of you against the Union flag board is definitely the stand out picture in your port.
