Over the years I've gathered that most priests regard marriage preparation and the execution of Nuptial Masses and ceremonies to be among their most dreaded chores. I think that this is because, for one thing, they take up a lot of time. With just over a year now in my career as parish priest, I have witnessed seven marriages and have sixteen more in production. Very few go by without any hitch at all; you almost always have to do something extra, like finding baptismal records from suppressed parishes, figuring out inter-ritual or inter-religious dispensations, obtaining decrees of nullity from previous marriages lacking canonical form, or asserting your rights and jurisdiction against the dreaded "wedding planner." All I can say is thank God one of my best friends in the Order is a canon lawyer.
Not that these things are always a terrible hassle, but in most cases you are doing them on behalf of young people with little more than a tangential relationship to their religion, much less to the parish. (There are shining exceptions.) Most, sadly, are "cultural Catholics" who probably won't be seen in church again until the next spiritual emergency, like when they have to baptize a baby. So I think that a lot of priests find it to be a sad situation and resent having to spend a lot of time on it.
I also find it sad, but I've also come to appreciate these young people. Even though they have not kept up with their faith--probably because it was never taught to them in a way that was relevant to their lives or portable into adulthood--I find them to be people of faith. It is an amazing act of faith to get married, after all; to bet that your own mutual love and regard is stronger than a future you can't even know. To me, that's almost the definition of faith.
In this world with its utter disregard for the creation and the gift of life within it, with its violence and morbid desire to see its own shipwreck, I find it very encouraging that people still insist on falling in love with each other. And they know at some level that love demands a complete commitment, even though we can't know what forever or complete is going to mean. But we do it anyway, because love is the way we touch Eternity and only eternity satisfies it.