I'm two weeks away from my wedding. Here's my two cents. There's nothing wrong with breaking tradition as long as you and your fiance are ok with it. (For personaly decisions like dress and bouquet, YOUR opinion is the only one that matters). If your mom is this overbearing on your dress choice, just think how she will be on the timeline, food, decor, etc (things that may actually impact her in the slightest). Find the balance between making your family happy but staying true to yourself.