For the most part, I'm alright with it. Roman Catholicism is the one denomination I wouldn't consider, and that's only because of the Church's insistence that were we to marry, our children would need to be raised Catholic (kind of awkward considering I'm a Protestant minister).
How much impact doctrine has overall is pretty debatable, IMHO. How many of you have the exact same doctrinal convictions now that you did five years ago? And why would you take something so transient and make it the basis of a relationship?
Heh, I know a couple who both went into the relationship saying "I refuse to date anyone who isn't a Calvinist." They fell in love, married, and then one of them rejected Calvinism. Fortunately their views have softened so their marriage carries on unabated, but it goes to show how much we can overemphasize doctrine.