Your gown should go along with the theme or the mood of your wedding. If your wedding it at sunset and you plan on it being very romantic, a romantic dress is in order! In other words, you should belong at at your wedding.
Romantic Weddings- try lace or bias cut charmeuse gowns
Beach Wedding- those call for light and are dresses that will release the sand that there tends to be so much of at the beach.
Elegant/ Black tie/ Ballroom - How about a ballgown? Nothing says raise that pinky in the air like that full, fluffy, blingy dress that most of us dreamed of wearing when we met our significant other.