It is vitally important that you feel comfortable in your chosen wedding dress. You want to feel fabulous all day and night as well as look fabulous. With all the meeting and greeting, dancing, photography posing and laughing, the day is going to take its toll on you and the dress. Slipping over your train, tugging at the bodice or feeling you can't breathe as it's far too tight is not the look you want to achieve.
Think about what you wear on a day to day basis. Just like everyday clothes, different dresses look good on different brides. You should consider what areas of your body you love the most - show them off and accentuate them! If you have a tiny waist then look for a two piece wedding dress or a lace back corset style gown to define it.
Long legs look fantastic in a shorter style dress whilst bustlines can be emphasised with a sweetheart shaped neckline. Trust your bridal sales assistant, they will be honest about what gowns look good on certain body shapes and will have seen hundreds of brides in wedding dresses.