Before I started shopping I had asked FI if there was anything he really did not want to see in my dress or something he was hoping he'd see. He was partial to a cap sleeve on the dress. Unfortunately for him, I did not find any dresses with sleeves like that that I liked. I went with my gut and found a dress that made me feel like a bride.
Go with what makes you feel beautiful because he'll see your beauty shining through no matter what shape neckline your dress has!