Whatever you decide to have you will need to think about your dress and how it will complement your hairstyle. If you have a high neck dress it's best to have an upstyle. If you want to cover some tattoos, then down is great. With a strapless dress you can have your hair up or down.
It maybe nice to have your hair over to one side if you have one shoulder strap on your dress.
Of course, the best idea is to have a hair trial. Before your trial you need to have some idea and have some photos of what you do and don't like and take them along with you. If you are going to be wearing any accessories in your hair or a veil it's also a great idea to take them along to the hair trial too so you can see what they will look like when all together.
If your wedding has a vintage theme then a vintage hairstyle would be nice.