Back when we got married our pastor told us he worried when couples wanted to write their own vows. In his experience, custom vows were often overly long and overly idealistic.
But in this wedding last month, the custom vow wasn't too long and certainly not overly idealistic. The bride told the groom that she recognized that only God could love her as perfectly as she wanted to be loved, so she released him from that false expectation that he can and ought to satisfy her every need.
I like that laying aside of unrealistic expectations. It was actually quite realistic about marriage, that it is a hard thing we need God's help for to do really well.