That dress!! Since it is off the shoulder, I would lean towards your hair down. Maybe half up half down with loose curls? I also like Georgette's idea of up with pieces of hair framing your face! I would suggest a hairstyle that doesn't have too much texture to where it takes away from the dress, since it has beautiful detailing!
My dress is also off the shoulder. I am going all up with some loose hair falling down. Simply because I can almost guarantee that my hair will look good from start to finish. I love to dance so having it up it will be out of my way.
Beautiful dress!! Are you going to wear a veil? Maybe ask a trusted friend that knows your style! I had an updo for my wedding but that was along time ago! I personally love a side look or 1/2 up, 1/2 down...You have nailed the dress!
I'm still wedding dress shopping, but I know how I'll be styling my hair! I will actually have 2 looks, for the ceremony I'm going for an elegant simple look, so my hair will be down and slightly curled with a hair piece pulling one side back. Second look for the reception I will have my hair half up with braids and more curls and flowers in my hair.