Another consideration is the ability to shoot portraits during daylight. If you are getting married in the evening and sunset happens before or during your ceremony, you really should talk to your photographer about how this will impact the post-ceremony pictures, which may require supplemental “flash” type lighting (and may not represent the photographs you fell in love with in their portfolio). Relatedly, if you are playing your ceremony time right up to the edge, NEVER count on sunset light. On a cloudy day, it will start to feel dark about an hour before sunset.
When our daughter got married, she and her husband did a "first look" that included both sets of parents, as they had chosen to have the bridal couple walk down the aisle together rather than be accompanied separately by parents. It was a nice way to have a nod to tradition and include us in a very emotional moment. The photos are beautiful, too. There’s one where the bridal couple gaze at each in the foreground, while behind them, my husband and I share a glance that is similarly filled with love. We wouldn’t have had that moment without the choice to do the "first look".